TWM658842U - Dental orthodontic appliance and orthodontic system - Google Patents

Abstract

The present utility model relates to the field of orthodontic technology for teeth and discloses a dental orthodontic appliance and an orthodontic system. The dental orthodontic appliance includes a first shell-like body and a second shell-like body which are used to accommodate the upper teeth and the lower teeth, respectively. The first shell-like body protrudes towards the opposite jaw direction at a position corresponding to the posterior teeth area, and the first shell-like body is provided with a first protrusion for adjusting the relative position between the upper jaw and the lower jaw. The second shell-like body protrudes towards the opposite jaw direction at a position corresponding to the posterior teeth area, and the second shell-like body is provided with a second protrusion for adjusting the relative position between the upper jaw and the lower jaw. The first protrusion includes a first surface, and the second protrusion includes a second surface. When the first surface and the second surface interact with each other, the first protrusions and the second protrusion are guided to move relative to each other, so that the relative position of the upper jaw and the lower jaw are adjusted. And the actual movement of the lower jaw in the sagittal direction exceeds the preset movement amount, so that the condylar joint of the lower jaw are as stimulated and the development of the jaw bones is promoted or inhibited.

Description

Dental appliances and treatment systems

The present invention relates to the field of orthodontic technology, and more particularly to a dental appliance and a dental correction system.

Malocclusion refers to the imbalance of the position and relationship of teeth, dental arches, maxilla and cranium. Common symptoms include crowded teeth, gaps between teeth, reverse jaw, etc. Most malocclusions are caused by congenital genetic factors or acquired environmental factors such as diseases, bad oral habits, tooth replacement disorders, etc. during the growth and development of children. They can also be caused by trauma, periodontal disease, etc. after growth and development, such as uneven teeth, abnormal occlusal relationship between upper and lower dental arches, abnormal size, shape and position of maxilla, facial deformity, etc.

The shell tooth orthodontic appliance is a device for treating malocclusion. It uses a safe, flexible, transparent polymer material, which allows the correction process to be completed almost unnoticed by others. For cases of deformity with sagittal jaw position factors, jaw reconstruction is required to correct the jaw position and achieve mandibular anterior or posterior guidance.

Existing invisible appliances for jaw reconstruction include: TB (short for Twin-block, also known as double-block plate appliance) and reverse TB. Among them, the role of TB is to promote the growth of mandibular bones and retract the upper front teeth at the same time. The misalignment between the upper and lower jaws is corrected by functionally moving the mandible forward through the adjusted occlusal slope. The masticatory muscle system must guide the mandible to be in a protruding position to adapt to the changed new occlusal balance system, and is usually used to guide the chin to protrude. The reverse TB mainly adjusts the occlusal slope to functionally inhibit the mandible from moving forward, promote the development of the maxillary bones, and achieve the treatment of crossbite.

The existing design method is to design the shape of the upper and lower jaw guides based on the maximum position that the mandibular bone can extend or retreat, and use the slope to guide the mandibular bone to extend or retreat to the maximum position during wearing. However, in actual application, it is found that the jaw position adjustment position in the new occlusal balance system often fails to achieve the treatment goal, and its treatment performance rate is poor.

The "頜" in "wrong jaw", "open jaw", "covered jaw", "jaw plane" and the like in the present invention is "牙合" (ㄏㄜˊ), which is a rare character. Since this character is not included in the general input method glyph file, it is often written as "頜" in daily life and on the Internet. For the convenience of reading, this article also writes it as "頜".

The main purpose of the new embodiment is to provide a dental appliance and a correction system to solve the problem that when the inter-jaw relationship is adjusted through TB, the jaw adjustment position in the new occlusal balance system often fails to achieve the treatment goal and the treatment expression rate is poor.

To achieve the above-mentioned purpose, the present invention provides a dental appliance, comprising: a first shell-shaped body and a second shell-shaped body for accommodating upper and lower teeth, respectively; the first shell-shaped body protrudes toward the opposite jaw at a position corresponding to the posterior teeth area and is provided with a first protrusion for adjusting the relative position relationship between the upper and lower jaws; the second shell-shaped body protrudes toward the opposite jaw at a position corresponding to the posterior teeth area and is provided with a first protrusion for adjusting the relative position relationship between the upper and lower jaws. The first protrusion comprises a first action surface, and the second protrusion comprises a second action surface. When the first action surface and the second action surface interact with each other, the first protrusion and the second protrusion are guided to move relative to each other to adjust the inter-mandibular relationship between the maxillary teeth and the mandibular teeth, and the actual sagittal movement of the mandibular teeth exceeds the preset movement, so that the condylar joint of the mandibular teeth is stimulated to promote or inhibit the development of the maxillary bones.

The new embodiment also provides a treatment system, including a series of dental appliances, which gradually implement a treatment plan for patients with maxillary and mandibular teeth, and the series of dental appliances includes: a first group of appliances, at least one dental appliance in the first group of appliances is a first type of dental appliance, and the first type of dental appliance is the above-mentioned dental appliance.

The new embodiment also provides a dental treatment system, including a series of dental appliances, which gradually implement a treatment plan for patients with maxillary and mandibular teeth, at least part of the series of dental appliances are the above-mentioned dental appliances, and each α ₂ in this part of the dental appliances: as the treatment plan progresses, the α ₂ gradually increases until it is equal to the α ₁ ; or, as the treatment plan progresses, the α ₂ gradually decreases from the α ₁ until it is equal to a preset angle, and the preset angle is greater than or equal to 15 degrees.

The dental appliance in the novel embodiment is used to adjust the relationship between the maxillary teeth and the mandibular teeth. By limiting the shape of the active surfaces of the upper and lower protrusions, the actual sagittal upward movement of the mandibular teeth exceeds the preset movement, thereby achieving an over-correction effect, so that the condylar joints of the mandibular teeth are stimulated, the development of the maxillary bones is promoted or inhibited, and the upper and lower mandibular teeth are stably occluded in the target position in the new occlusal balance system as much as possible, thereby improving the expression rate of the correction plan.

In some embodiments, the difference between the actual sagittal movement of the mandibular teeth and the preset movement is less than or equal to 5 mm. The actual movement of the mandibular teeth achieved by the novel orthodontic appliance is limited to within 5 mm of the preset movement. During the treatment process, the user's comfort and treatment effect are taken into consideration as much as possible, while avoiding uncontrollable factors caused by excessive treatment range.

In some embodiments, one of the first and second action surfaces includes a first inclined surface and a second inclined surface, the first inclined surface is arranged close to the opposite jaw, the end of the second inclined surface close to the first inclined surface is connected to the end of the first inclined surface far from the opposite jaw, and the end of the second inclined surface close to the surface of the orthodontist is the end of the action surface close to the surface of the orthodontist; wherein, the sharp angle _α1 between the first inclined surface and the jaw plane is greater than the sharp angle _α2 between the second inclined surface and the jaw plane. By designing two inclined surfaces on the action surface, the sharp angle between the action surface and the jaw plane is changed, the length of the action surface is extended, and the relative movement distance of the upper and lower jaws is extended, so that in the process of the lower jaw moving to the bottom, the condyle growth or absorption is fully stimulated, and the jaw position reconstruction is further helped. In addition, the relative movement distance of the upper and lower jaws is extended by the smaller inclination angle portion of the first action surface, and the larger inclination angle portion ensures the training of the masticatory muscles during tooth occlusion.

In some embodiments, the other of the first and second action surfaces is an integral inclined surface, and the sharp angle _α3 with the jaw plane is greater than or equal to _α2 and less than or equal to _α1 . At least one action surface of the upper and lower protrusions is limited to an integral inclined surface to maintain accurate movement in the guide inclined surface and avoid interference with the user's bite experience during movement.

In some embodiments, the _α1 is less than or equal to 75 degrees and greater than or equal to 65 degrees. In some embodiments, the _α2 is less than or equal to 70 degrees and greater than or equal to 15 degrees. In some embodiments, the difference between the _α1 and the _α2 is greater than or equal to 5 degrees and less than or equal to 45 degrees. By limiting the range of different inclination angles of the bevel, the user's comfort and the correction effect are balanced, and at the same time, uncontrollable factors caused by excessive correction are further avoided.

In some embodiments, the end of the second bevel close to the first bevel is connected in an arc shape to the end of the first bevel far from the jaw. The arc connection further maintains accurate movement in the guide bevel to avoid interfering with the user's bite experience during the movement.

In some embodiments, the first action surface and the second action surface are an integral inclined plane, and when the sharp angles of the first action surface and the second action surface relative to the jaw plane are different, the sharp angle of the smaller action surface relative to the jaw plane is _α4 , and the _α4 is less than or equal to 65 degrees and greater than or equal to 15 degrees; when the sharp angles of the first action surface and the second action surface relative to the jaw plane are the same, the sharp angle relative to the jaw plane is _α5 , and the _α5 is less than or equal to 65 degrees and greater than or equal to 15 degrees. The action surfaces of the upper and lower protrusions are both integrally inclined surfaces. By reducing the inclination angle of the action surfaces, the relative movement stroke of the action surfaces is lengthened, so as to accurately achieve the actual sagittal upward movement of the mandibular teeth exceeding the preset movement amount, while also avoiding interference with the user's occlusal experience during the movement process.

In some embodiments, the _α4 is less than or equal to 45 degrees and greater than or equal to 15 degrees; the _α5 is less than or equal to 45 degrees and greater than or equal to 15 degrees.

In some embodiments, the length of the first protrusion in the mesial-distal direction is greater than the length of the second protrusion in the mesial-distal direction. Since the mandibular movement is mainly the movement of the jaw, the length of the lower protrusion is limited to be smaller, so as to avoid interference with other tissues during the mandibular movement and ensure the flexibility of the mandibular movement.

In some embodiments, the first action surface is located at the mesial side of the first protrusion, and the second action surface is located at the distal side of the second protrusion. When the first action surface and the second action surface interact with each other, the second protrusion is guided to move forward in the sagittal direction, so that the condylar joint of the mandibular tooth is stimulated and the development of the mandibular bone is promoted. The positional relationship between the action surface and the protrusion is limited so as to accurately guide the mandible forward and improve the expression rate of the treatment plan.

In some embodiments, the first raised portion is within the range of tooth positions 4 to 6 on the upper jaw, and the second raised portion is within the range of tooth position 5 on the lower jaw.

In some embodiments, the second action surface is located at the mesial side of the second protrusion, and the first action surface is located at the distal side of the first protrusion. When the first action surface and the second action surface interact with each other, the second protrusion is guided to move sagittally upward and backward, so that the condylar joint of the mandibular tooth is stimulated and the development of the maxillary bone is promoted. The positional relationship between the action surface and the protrusion is limited so as to accurately guide the mandibular direction and improve the expression rate of the treatment plan.

In some embodiments, the first action surface is provided with a first stabilizing portion, and the second action surface is provided with a second stabilizing portion. When biting, the first stabilizing portion and the second stabilizing portion interact with each other to stably bit the upper and lower jaws at a preset position. In some embodiments, the first stabilizing portion and the second stabilizing portion are friction structures formed on the first action surface and the second action surface, or the first stabilizing portion and the second stabilizing portion are concave-convex matching structures formed on the first action surface and the second action surface. In some embodiments, the concave-convex matching structure is a saw-like structure provided on the first action surface and the second action surface. By limiting the first action surface and the second action surface to include stabilizing portions respectively, the mutual stability of the protrusions can be increased during biting, thereby improving the ability to maintain the stable position of the biting.

In some embodiments, the mechanical strength of the first protrusion and/or the second protrusion is greater than the mechanical strength of other parts of the shell-shaped body. By limiting the upper and lower protrusions to have greater mechanical strength, damage to the upper and lower protrusions during occlusion is avoided as much as possible.

In some embodiments, the buccal side and/or lingual side of the first protrusion and/or the second protrusion are provided with a reinforcement structure, and the reinforcement structure is formed by the buccal side and/or lingual side of the first protrusion protruding outward or concave inward. The upper and lower protrusions are provided with reinforcement structures to increase the strength of the protrusions and further avoid damage to the protrusions.

In some embodiments, the surface of the first protrusion and/or the second protrusion facing the opposing dentition is a contact surface, and the structure of the contact surface is a concave-convex structure with the same anatomical features as the occlusal surface of the opposing teeth. The surface where the upper and lower protrusions contact each other is limited to an anatomical structure to improve the stability of the contact.

In some embodiments, the first protrusion and/or the second protrusion is formed by the occlusal surface of the shell-like body protruding toward the jaw, or by the occlusal surface of the shell-like body thickening toward the jaw. The formation form of the upper and lower protrusions is further limited to accurately realize the structure of the protrusions.

In some embodiments, the preset movement amount is the sagittal movement of the mandibular teeth required to achieve the patient's treatment goal.

In some embodiments, the first shell-shaped body includes two first protrusions, and the two first protrusions belong to the same tooth position; the second shell-shaped body includes two second protrusions, and the two second protrusions belong to the same tooth position. It is defined that there are two upper and lower protrusions respectively, and the tooth positions are symmetrically arranged, so as to improve the occlusal stability during occlusion.

In some embodiments, the first set of orthodontic appliances in the correction system is used to implement the first stage of the treatment plan, and the correction system further includes: a second set of orthodontic appliances used in the second stage of the treatment plan, wherein at least one dental orthodontic appliance in the second set of orthodontic appliances is a second type of dental orthodontic appliance, including: a third shell-shaped body and a fourth shell-shaped body respectively used to accommodate the upper jaw teeth and the lower jaw teeth, the third shell-shaped body protruding in the position corresponding to the posterior teeth area toward the opposite jaw direction and having a portion for adjusting the relative position between the upper and lower jaws. The third protrusion of the system is provided, and the third shell-shaped main body protrudes toward the opposite jaw direction at a position corresponding to the posterior tooth area, and is provided with a fourth protrusion for adjusting the relative position relationship between the upper and lower jaws. The third protrusion includes a third action surface, and the fourth protrusion includes a fourth action surface. When the third action surface and the fourth action surface interact with each other, the third protrusion and the fourth protrusion are guided to move relative to each other to adjust the inter-jaw relationship between the upper jaw teeth and the lower jaw teeth, and the actual movement amount of the lower jaw teeth in the sagittal direction is equal to the preset movement amount.

In some embodiments, the first stage corresponds to a time earlier than the second stage in the treatment plan; or, the first stage corresponds to a time later than the second stage in the treatment plan. It is further limited that the first type of dental appliance that can be used before the conventional dental appliance in the partial correction system can be used, and the condylar joint of the mandibular teeth is fully stimulated during the correction process to promote the development of the maxillary bone. At the same time, the second type of dental appliance is used to maintain the correction goal of the first type of dental appliance, so that the upper and lower jaw teeth in the new occlusal balance system are stably occluded in the target position as much as possible, thereby improving the expression rate of the correction plan. In addition, it is further limited that the first type of dental appliances that can achieve correction in some correction systems are used later than conventional dental appliances. When the initial correction effect is not up to standard, the dental appliances that can achieve correction are used for compensatory correction, thereby further improving the expression rate of the correction plan.

In some embodiments, at least two dental appliances in the first group of appliances are of the first type. In some embodiments, the height of each first protrusion and each second protrusion in each of the first type of dental appliances meets the requirement that the height of each first protrusion and each second protrusion in the first type of dental appliances implemented later is lower than the height of each first protrusion and each second protrusion in the first type of dental appliances implemented earlier. In some embodiments, all dental appliances in the first group of appliances are of the first type. The height of the upper and lower protrusions is defined as gradually decreasing in the treatment plan of the first stage, so that after the upper and lower jaw positions gradually tend to be normal in the new occlusal stability relationship, the interference of the upper and lower protrusions on the occlusion can be minimized.

In some embodiments, at least two dental appliances in the second group of dental appliances are the second type of dental appliances, and the height of each third protrusion and each fourth protrusion in each of the second type of dental appliances meets the requirement that the height of each third protrusion and each fourth protrusion in the second type of dental appliances implemented later is lower than the height of each third protrusion and each fourth protrusion in the second type of dental appliances implemented earlier. It is further defined that in the second stage of the treatment plan, the height of the upper and lower protrusions is gradually reduced, so that after the upper and lower jaw positions gradually tend to be normal in the new occlusal stability relationship, the interference of the upper and lower protrusions on the occlusion can be minimized.

In some embodiments, when the first stage corresponds to a later time than the second stage in the treatment plan, the series of dental appliances further includes: a third group of dental appliances used in the third stage of the treatment plan, the third stage corresponds to a later time than the first stage in the treatment plan, and at least one dental appliance in the third group of dental appliances is the second type of dental appliance. The treatment plan is further limited to include a third stage to be implemented, the third stage includes the second type of dental appliances, and is used later than the first type of dental appliances, to achieve maintenance treatment after correction, fully exercise the movement of the masticatory muscles, and reduce the possibility of recurrence.

In some embodiments, each α ₂ in the partial dental appliance in the partial correction system gradually decreases to equal the preset angle as the treatment plan proceeds, and then increases to the α _1. It is further defined that after the compensation correction of the occlusal position adjustment is performed by overcorrection, the partial dental appliance is used to maintain the jaw position adjustment, fully exercise the movement of the masticatory muscles, and reduce the possibility of recurrence.

In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the attached drawings. However, those with ordinary knowledge in the technical field to which the present invention belongs can understand that in the embodiments of the present invention, many technical details are proposed in order to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed to be protected by the present invention can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation method of the present invention. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.

In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one".

The "anterior tooth area" and "posterior tooth area" mentioned in each embodiment of the present invention are defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36 to 38. The posterior tooth area includes premolars and molars, which are displayed as teeth 4 to 8 according to the International Dental Federation (FDI) notation. The anterior tooth area is displayed as teeth 1 to 3 according to the FDI notation, and the teeth in the anterior tooth area include central incisors, lateral incisors and canines. In addition, the teeth in the deciduous tooth stage are explained. The "anterior tooth area" and "posterior tooth area" are defined according to the classification of deciduous teeth in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 40-41, including three categories: deciduous incisors, deciduous canines and deciduous molars. The anterior tooth area includes deciduous incisors and deciduous canines, among which the deciduous incisors include deciduous central teeth and deciduous lateral incisors. The posterior tooth area includes deciduous molars, among which the deciduous molars include the first deciduous molars and the second deciduous molars.

The "sagittal direction" mentioned in each embodiment of the present invention is defined in the "Terms of Medical Imaging Technology", specifically the direction in which the center line of the X-ray enters the subject's body from the front or back and is parallel to the sagittal plane.

The "maxillary plane" mentioned in each embodiment of the present invention is obtained according to the definition and confirmation method of "Orthodontics" 6th edition, page 83. One method is to connect the occlusal midpoint of the first permanent molar and the midpoint between the upper and lower central incisors (1/2 of the overbite or open jaw); the other method is obtained by evenly dividing the posterior maxillary contact point, and the maxillary contact point of the first permanent molar and the first deciduous molar or the first premolar is often used.

In order to solve the above-mentioned problems, some embodiments of the present invention provide a dental orthodontic appliance, comprising: a first shell-shaped body and a second shell-shaped body for accommodating upper and lower teeth respectively, wherein the first shell-shaped body protrudes toward the opposite jaw at a position corresponding to the posterior teeth area and is provided with a first protrusion for adjusting the relative position relationship between the upper and lower jaws, and the second shell-shaped body protrudes toward the opposite jaw at a position corresponding to the posterior teeth area and is provided with a first protrusion for adjusting the relative position relationship between the upper and lower jaws. The second protrusion is in a positional relationship, the first protrusion includes a first action surface, and the second protrusion includes a second action surface. When the first action surface and the second action surface interact with each other, the first protrusion and the second protrusion are guided to move relative to each other to adjust the inter-mandibular relationship between the maxillary teeth and the mandibular teeth, and the actual sagittal movement of the mandibular teeth exceeds the preset movement, so that the condylar joint of the mandibular teeth is stimulated to promote or inhibit the development of the maxillary bone.

The following will be specifically described in conjunction with specific embodiments of the implementation details of the dental appliance described in this novel embodiment. The following content is only provided for the convenience of understanding the implementation details and is not necessary for the implementation of this solution.

An embodiment of the present invention provides a dental orthodontic appliance, as shown in FIG1, the dental orthodontic appliance in the embodiment comprises: a first shell-shaped body 20 for accommodating the upper jaw teeth 10, a second shell-shaped body 40 for accommodating the lower jaw teeth 30, the first shell-shaped body 20 protrudes toward the opposite jaw at a position corresponding to the posterior tooth area 12 (which may include premolars 14, 15 and molars 16, 17, as shown in FIG3a) and is provided with a first protrusion 21 for adjusting the relative position relationship between the upper and lower jaws, and the second shell-shaped body 40 protrudes toward the opposite jaw at a position corresponding to the posterior tooth area 12 and is provided with a first protrusion 21 for adjusting the relative position relationship between the upper and lower jaws. The second protrusion 41 is used to adjust the relative position relationship between the upper and lower jaws. The first protrusion 21 includes a first action surface 211 (shown in FIG. 3a ), and the second protrusion 41 includes a second action surface 411 (shown in FIG. 3a ). When the first action surface 211 and the second action surface 411 interact with each other, the first protrusion 21 and the second protrusion 41 are guided to move relative to each other to adjust the inter-jaw relationship between the maxillary teeth 10 and the mandibular teeth 30, and the actual sagittal movement of the mandibular teeth 30 exceeds the preset movement, so that the condylar joint of the mandibular tooth 30 is stimulated to promote or inhibit the development of the maxillary bone.

In some embodiments, the preset movement amount can be the sagittal upward movement amount of the mandibular teeth 30 required to achieve the patient's treatment goal, wherein the treatment goal can be specified by the doctor, or determined by the upper and lower jaw positions that meet the normal occlusal relationship in the classification of malocclusion, which will not be listed one by one here. In some embodiments, protrusions are respectively provided on the upper and lower jaw orthodontics, and the height of the protrusions is determined by the actual height of the teeth and the sagittal movement amount required to adjust the relationship between the jaws. During the occlusion process after wearing, when the relative movement reaches the bottom, that is, the position state of Figure 2b, the teeth are closed, and the relative position of the upper and lower jaws is in a normal overbite relationship position, or a better overbite relationship position determined by the doctor. In this embodiment, when the height of the protrusion remains unchanged, the length of the relative action surface is extended to achieve an actual sagittal movement exceeding the preset movement.

In some embodiments, the preset movement amount can also be preset by the doctor. It can be seen that there are various ways to confirm the preset movement amount, which is not limited here. In some embodiments, the distance exceeding the preset movement amount can be confirmed by the doctor, or preset, such as less than 5mm, such as 3mm, 1mm, 0.5mm, etc. Take the movement process shown in Figures 2a and 2b as an example for explanation, the first protrusion 21 of the first shell-shaped body 20 worn on the upper jaw and the second protrusion 41 of the second shell-shaped body 40 worn on the lower jaw interact with each other, and the actual movement amount of the lower jaw in the sagittal direction is from position a to position c, specifically S, and the preset movement amount is S1, that is, moving from position a to position b, and the actual movement amount exceeds S2.

In this embodiment, as shown in FIG. 3a and FIG. 3b, the second action surface 411 is located at the mesial side of the second protrusion 41, and the first action surface 211 is located at the distal side of the first protrusion 21. When the first action surface 211 and the second action surface 411 interact with each other, the second protrusion 41 is guided to move sagittally upward and backward (i.e., the Y1 direction in FIG. 3a), so that the condylar joint of the mandibular tooth 30 is stimulated and the development of the maxillary bone is promoted. The positional relationship between the action surface and the protrusion is limited so as to accurately guide the mandibular direction and improve the expression rate of the treatment plan.

To continue, in some embodiments, the first action surface 211 and the second action surface 411 are integrally inclined surfaces. When the sharp angles of the first action surface 211 and the second action surface 411 relative to the jaw plane are the same, the sharp angle relative to the jaw plane is α ₅ , and α ₅ is less than or equal to 65 degrees and greater than or equal to 15 degrees. In some examples, α ₅ is further defined as less than or equal to 45 degrees and greater than or equal to 15 degrees. In other words, in this embodiment, the first action surface 211 and the second action surface 411 are parallel to each other.

In some embodiments, the length of the first protrusion 21 in the mesiodistal direction is greater than the length of the second protrusion 41 in the mesiodistal direction. Taking Figures 3a and 3b as examples, the first protrusion 21 is within the range of the maxillary 4 to 6 teeth (14, 15, 16), that is, the coverage range of the first protrusion 21 on the occlusal surface of the orthodontic appliance is within the range of the occlusal surface of the maxillary 4 to 6 teeth, that is, the projection of the first protrusion 21 relative to the maxillary plane is within the range of the projection of the occlusal surface of the 4 to 6 teeth relative to the maxillary plane. Correspondingly, the second raised portion 41 is within the range of the mandibular tooth position No. 6, that is, the coverage range of the second raised portion 41 on the occlusal surface of the corresponding orthodontic appliance is within the range of the occlusal surface of the mandibular tooth position No. 6, that is, the projection of the second raised portion 41 relative to the maxillary plane is within the range of the projection of the occlusal surface of the No. 6 tooth position relative to the maxillary plane.

Since the main movement during occlusal movement is the mandibular movement, the length of the lower protrusion is limited to be smaller, so as to avoid interference with other tissues during mandibular movement as much as possible and ensure the flexibility of mandibular movement. In some embodiments, the length of the first protrusion 21 in the mesiodistal direction can be two or three times that of the second protrusion 41, for example, it can be determined according to the actual tooth position space, which will not be elaborated here.

To continue, in some embodiments, the mechanical strength of the first protrusion 21 and the second protrusion 41 is greater than the mechanical strength of other parts of the shell-like body. By limiting the upper and lower protrusions to have greater mechanical strength, damage to the upper and lower protrusions during occlusion can be avoided as much as possible. In some embodiments, the mechanical strength of any one of the first protrusion 21 and the second protrusion 41 can be greater than the mechanical strength of other parts of the shell-like body. In some embodiments, the first protrusion 21 and the second protrusion 41 can be made of a material with a larger elastic modulus. By selecting materials with different elastic moduli, the mechanical strength of the first protrusion 21 and the second protrusion 41 relative to other positions of the orthodontic device to which they belong can be enhanced. Similarly, in some embodiments, the first protrusion 21 and the second protrusion 41 may be made of a material with higher hardness to enhance the mechanical strength of the first protrusion 21 and the second protrusion 41. There are many ways to increase the mechanical strength in actual applications, which will not be described one by one here.

In some embodiments, also in combination with FIG. 3a and FIG. 3b, the surfaces of the first raised portion 21 and the second raised portion 41 facing the opposing dentition in this embodiment are contact surfaces (212 and 412), and the structure of the contact surface is a concave-convex structure with the same anatomical features as the occlusal surface of the opposing teeth. The surfaces of the upper and lower raised portions facing the opposing dentition are limited to anatomical structures to improve the stability of the contact. In addition, in some embodiments, the contact surface of one of the first raised portion 21 and the second raised portion 41 facing the opposing dentition can be set to be a concave-convex structure with the same anatomical features as the occlusal surface of the opposing teeth.

In some embodiments, the first protrusion 21 and the second protrusion 41 can be formed by the occlusal surface of the shell-like body protruding toward the jaw, for example, the protrusion can be hollow. In some embodiments, the first protrusion 21 and the second protrusion 41 can also be formed by the occlusal surface of the shell-like body thickening toward the jaw, and in other embodiments, the protrusion can be formed by a pad set at a desired position. In some embodiments, in addition to the above-mentioned setting methods, other setting methods can also be adopted, which are not listed one by one here. Therefore, by further limiting the formation form of the upper and lower protrusions, the structure of the protrusion is accurately realized, making the implementation method in the present invention flexible and changeable.

It is worth mentioning that in some embodiments of the present invention, when the first protrusion 21 is a hollow structure, a filling body built into the first protrusion 21 can be used as a reinforcing structure. In some embodiments, when the first protrusion 21 is a hollow structure, the reinforcing structure can be a filling body built into the first protrusion 21. In some embodiments, the shape of the filling body can be consistent with the inner diameter of the first protrusion 21. The method of increasing the strength of the first protrusion 21 by embedding a filling body in the hollow structure is simple and effective. In some embodiments, the material of the filling body is resin. In actual applications, the filling body and the dental appliance can be delivered to the user separately, and the user can be guided to put the filling body into the hollow part of the shell-shaped body before wearing the dental appliance, which is convenient and practical. In addition, the various forms of reinforcement structures mentioned in the above embodiments can be used alone or in combination to adapt to different application scenarios and design requirements, which will not be elaborated here.

After the dental appliance in the present novel embodiment is worn on the upper and lower jaws of the patient, during the bite action, the first action surface 211 of the upper jaw 1 contacts the second action surface 411 of the lower jaw, generating relative motion, guiding the lower jaw 2 to move along the first action surface 211, which is expressed in the sagittal plane as the lower jaw teeth 30 moving along the Y1 direction, thereby guiding the lower jaw 2 backward. The upper jaw 1 and the lower jaw 2 are shown in FIG1 .

It can be seen that the dental appliance in the new embodiment is used to adjust the relationship between the maxillary teeth and the mandibular teeth. By limiting the shape of the action surface of the upper and lower protrusions, the actual sagittal upward movement of the mandibular teeth exceeds the preset movement, achieving the effect of over-correction, so that the condylar joint of the mandibular teeth is stimulated, the development of the maxillary bones is promoted, and the upper and lower mandibular teeth are stably occluded in the target position in the new occlusal balance system as much as possible, thereby improving the expression rate of the correction plan. In addition, during the correction process, the user's comfort and correction effect are taken into account as much as possible, while avoiding uncontrollable factors caused by excessive over-correction.

Some other embodiments of the present invention provide a dental orthodontic appliance which is substantially the same as the above-mentioned embodiments, except that the directions of the active surfaces of the two are different. The active surfaces of the above-mentioned embodiments are used to guide the mandible to move backward, while the active surfaces of the present embodiment are used to guide the mandible to move forward.

As shown in FIG4 , the first action surface 221 is located at the mesial side of the first protrusion 22, and the second action surface 421 is located at the distal side of the second protrusion 42. When the first action surface 221 and the second action surface 421 interact with each other, the second protrusion 42 is guided to move sagittally upward and forward (i.e., in the Y2 direction) so that the condylar joint of the mandibular tooth 30 is stimulated, the development of the mandibular bone is promoted, and the development of the maxillary bone is inhibited. Thus, by limiting the positional relationship between the action surface and the protrusion, the mandibular bone is accurately guided forward, and the expression rate of the treatment plan is improved.

In some embodiments, the length of the first protrusion 22 in the mesiodistal direction is greater than the length of the second protrusion 42 in the mesiodistal direction. Since the mandibular movement is mainly the movement of the lower jaw, the length of the lower protrusion is limited to be smaller, so as to avoid the interference of the mandibular movement with other tissues as much as possible, and ensure the flexibility of the mandibular movement. Taking Figure 4 as an example, the first protrusion 22 is within the range of tooth positions 4 to 6 in the upper jaw, and the second protrusion 42 is within the range of tooth position 5 in the lower jaw.

In some embodiments, the sharp angles of the first action surface 221 and the second action surface 421 relative to the jaw plane are approximately the same, and can range from 15 degrees to 65 degrees, for example, from 15 degrees to 45 degrees, to better extend the length of the action surface and more accurately achieve the actual sagittal movement of the mandibular teeth exceeding the preset movement.

After the dental appliance in the above embodiment is worn on the patient's upper and lower jaws, during the biting action, the first action surface 221 of the upper jaw contacts the second action surface 421 of the lower jaw, generating relative movement, guiding the lower jaw to move along the first action surface 221, which is expressed in the sagittal plane as the movement of the lower jaw teeth along the Y2 direction, thereby guiding the lower jaw forward.

The above-mentioned embodiments can be further improved. In some embodiments, the shapes of the first action surface and the second action surface can be changed. The first action surface is provided with a first stabilizing portion, and the second action surface is provided with a second stabilizing portion. When biting, the first stabilizing portion and the second stabilizing portion interact with each other to make the upper and lower jaws stably bitten at a preset position. In some embodiments, the preset position can be the position reached when the lower jaw moves to the patient's natural biting and no longer moves forward. In addition, because the actual movement of the mandibular teeth in the sagittal direction is increased in the new embodiment, in some embodiments, when the patient first wears it, it may not be possible to achieve a state where the upper and lower raised portions move to contact the occlusal surface of the opposing jaw teeth, which easily leads to unstable bite. Therefore, a stabilizing portion is added to the action surface of the raised portion to improve the stability of the upper and lower raised portions when biting. In some embodiments, the first stabilizing portion and the second stabilizing portion are concave-convex matching structures formed on the first action surface and the second action surface. In some embodiments, the concave-convex matching structure is a saw-tooth structure provided on the first action surface and the second action surface. As shown in FIG5 , taking the saw-tooth structure as an example, the friction when the two are in contact is improved, and the holding capacity of the occlusal stability is improved. A portion of the first action surface 221 is provided as a saw-tooth action surface 222, and a portion of the second action surface 421 is provided as a saw-tooth action surface 422, and the saw-tooth action surface 222 of the first action surface 221 and the saw-tooth action surface 422 of the second action surface 421 match. In other embodiments, in addition to the saw-tooth structure, the concave-convex matching structure can also adopt concave-convex matching structures of other shapes, which are not listed one by one here. In some other embodiments, the first stabilizing portion and the second stabilizing portion may also be friction structures formed on the first action surface and the second action surface. For example, if a rough surface is provided, the friction force of the action surface may also be changed by changing the material, which is not listed here one by one. By limiting the first action surface and the second action surface to include stabilizing portions respectively, the mutual stability of the protrusions can be increased during occlusion, and the ability to maintain the occlusal stable position can be improved.

It can be seen that in the above-mentioned implementation mode, the dental appliance is used to adjust the relationship between the maxillary teeth and the mandibular teeth. By limiting the shape of the action surface of the upper and lower protrusions, the actual sagittal upward movement of the mandibular teeth exceeds the preset movement, achieving the effect of over-correction, so that the condylar joint of the mandibular teeth is stimulated, the development of the mandibular bone is promoted, and the development of the maxillary bone is inhibited, so that the upper and lower mandibular teeth in the new occlusal balance system are stably occluded in the target position as much as possible, and the expression rate of the correction plan is improved. In addition, during the correction process, the user's comfort and correction effect are taken into account as much as possible, while avoiding uncontrollable factors caused by excessive over-correction. In addition, in some embodiments, the saw-shaped working surfaces 222 and 422 are used to increase friction during interaction and improve the ability to maintain a stable occlusal position.

Other embodiments of the present invention provide a dental appliance that is substantially the same as the above-mentioned embodiments, the main difference being that the sharp angles of the first active surface and the second active surface relative to the jaw plane are different, which can reduce the length of the unilateral protrusion and correspondingly reduce the volume of the protrusion, thereby reducing the foreign body sensation in the oral cavity and increasing the occlusal flexibility.

In some embodiments, as shown in FIG. 6a and FIG. 6b, the first action surface 231 of the first protrusion 23 and the second action surface 431 of the second protrusion 43 have different sharp angles relative to the jaw plane. In some embodiments, the first action surface 231 and the second action surface 431 may both be integral inclined surfaces, that is, the first action surface 231 and the second action surface 431 are not parallel. In some embodiments, the angle between the first action surface 231 and the jaw plane is α ₄ , the angle between the second action surface 431 and the jaw plane is α ₆ , and α ₄ <α ₆ . In some embodiments, α ₄ may be less than or equal to 65 degrees and greater than or equal to 15 degrees, for example, α ₄ may be less than or equal to 45 degrees and greater than or equal to 15 degrees. At this time, the inclination angle of the second protrusion 43 is larger. When the height and the required movement amount remain unchanged, the length of the second action surface 431 can be shorter, that is, the length of the second protrusion 43 in the mesiodistal direction can be shorter, which reduces the foreign body sensation brought by the second protrusion 43 in the patient's mouth, and also reduces the possibility of the second protrusion 43 colliding with other surrounding instruments or tissues during the bite process, thereby increasing the flexibility of the second protrusion 43. In summary, when the sharp angles of the first action surface 231 and the second action surface 431 relative to the jaw plane are different, the sharp angle of the smaller action surface relative to the jaw plane is α ₄ , and α ₄ is less than or equal to 65 degrees and greater than or equal to 15 degrees.

It can be seen that in the above-mentioned embodiment, the first protrusion and the second protrusion are realized by adopting different sharp angles of the first active surface and the second active surface relative to the jaw plane, and the active surface with a larger inclination angle is used to reduce the patient's foreign body sensation and increase the occlusal flexibility after wearing the dental appliance in the new embodiment.

It is worth mentioning that although the above-mentioned embodiment takes the first active surface with a smaller inclination angle as an example, in actual application, the second active surface may also be set with a smaller inclination angle, and the functions are similar, which will not be elaborated here.

Other embodiments of the present invention provide a dental orthodontic appliance that is substantially the same as the above-mentioned embodiments, with the main difference being that one of the first and second active surfaces includes two inclined surfaces with different inclination angles, and by designing the two inclined surfaces, the sharp angle between the active surface and the jaw plane is changed, the length of the active surface is extended, and the relative movement distance of the upper and lower jaws is extended.

In some embodiments, as shown in FIG. 7a and FIG. 7b , the first active surface 241 of the first protrusion 24 includes a first inclined surface 2411 and a second inclined surface 2412, the first inclined surface 2411 is arranged close to the jaw, the end of the second inclined surface 2412 close to the first inclined surface 2411 is connected to the end of the first inclined surface 2411 far from the jaw, and the end of the second inclined surface 2412 close to the surface of the corrector is the end of the active surface close to the surface of the corrector; wherein, the sharp angle _α1 between the first inclined surface 2411 and the jaw plane is greater than the sharp angle _α2 between the second inclined surface 2412 and the jaw plane.

To continue, in some embodiments, the second action surface 441 of the corresponding second protrusion 44 is an integral inclined plane, and the sharp angle _α3 with the jaw plane is greater than or equal to _α2 , and less than or equal to _α1 . In some embodiments, the above _α1 is less than or equal to 75 degrees, and greater than or equal to 65 degrees. In some embodiments, the above _α2 is less than or equal to 70 degrees, and greater than or equal to 15 degrees. In some embodiments, the difference between _α1 and _α2 can be greater than or equal to 5 degrees, and less than or equal to 45 degrees. By limiting the range of different inclination angles of the inclined plane, the user's comfort and the correction effect are balanced, and at the same time, the uncontrollable factors caused by excessive correction are further avoided.

In some embodiments, the end of the second bevel 2412 close to the first bevel 2411 is connected in an arc shape to the end of the first bevel 2411 far from the jaw. The arc connection further maintains accurate movement in the guide bevel to avoid interfering with the user's bite experience during the movement.

During the engagement process when worn, the action surface 441 of the second protrusion 44 first contacts the first inclined surface 2411 of the first protrusion 24, and continues to move along the first inclined surface 2411. After moving to the second inclined surface 2412, it continues to move along the second inclined surface 2412 until reaching the limit position.

It can be seen that the above embodiment changes the sharp angle between the action surface and the jaw plane by designing two inclined surfaces on the action surface, extending the length of the action surface, and extending the relative movement distance of the upper and lower jaws, so that the condyle growth or absorption is fully stimulated in the process of the lower jaw moving to the bottom, and further helps the jaw reconstruction. In addition, the relative movement distance of the upper and lower jaws is extended by the part with a smaller inclination angle in the first action surface, and the part with a larger inclination angle ensures the training of the masticatory muscles during the tooth occlusion process. At least one action surface of the upper and lower raised parts is limited to an overall inclined surface, maintaining accurate movement in the guide inclined surface, and avoiding interference with the user's occlusion experience during the movement process.

It should be further explained that, in the previous embodiments, it was mentioned that the mechanical strength of the protrusions can be changed by changing the hardness and/or elastic modulus of the first protrusions and the second protrusions, and in the above embodiments, reinforcing structures can be provided on the buccal and lingual sides of the first protrusions and the second protrusions to enhance the mechanical strength of the first protrusions and the second protrusions.

As shown in FIG. 11 , the reinforcing structure 242 is formed by the buccal side and/or the lingual side of the first protruding portion 24 protruding outward or concave inward. The reinforcing structure 242 is limited to the upper and lower protruding portions to increase the strength of the protruding portion, thereby further avoiding damage to the protruding portion. In some embodiments, the same reinforcing structure may also be provided on the second protruding portion 44, or the reinforcing structure may be provided only on the second protruding portion 44. On the other hand, the reinforcing structure may be provided only on the buccal side, or only on the lingual side, which are not listed one by one here. The reinforcing structure is limited to the upper and lower protruding portions to increase the strength of the protruding portion, thereby further avoiding damage to the protruding portion.

In some embodiments, as shown in FIG. 12 , the first shell-shaped body 20 includes two first protrusions 24, and the two first protrusions 24 belong to the same tooth position; the second shell-shaped body 40 includes two second protrusions 44, and the two second protrusions 44 belong to the same tooth position. It is defined that there are two upper and lower protrusions respectively, and the tooth positions are symmetrically arranged, so as to improve the occlusal stability during occlusion.

It should be noted that in some embodiments, in addition to setting the first action surface as two inclined surfaces as mentioned above, the second action surface can also be set as two inclined surfaces. Taking Figure 8 as an example, the second action surface 451 on the second protrusion 45 includes a first inclined surface 4511 and a second inclined surface 4512. The corresponding first action surface 251 of the first protrusion 25 is an integral inclined surface, and the angle setting of each inclined surface is similar to the above-mentioned embodiment, which will not be repeated here.

In addition, some of the above embodiments are described by taking the TB used to guide the mandible to protrude forward as an example, while in some embodiments, the reverse TB can also be used to guide the mandible to retract. For example, the first protrusion of the upper jaw is defined as a double-beveled form, as shown in FIG9 , the first action surface 261 of the first protrusion 26 includes a first bevel 2611 and a second bevel 2612, and correspondingly, the second action surface 461 of the second protrusion 46 is an integral bevel. For example, the second protrusion of the lower jaw is defined as a double-beveled form, as shown in FIG10 , the second action surface 471 of the second protrusion 47 includes a first bevel 4711 and a second bevel 4712, and correspondingly, the first action surface 271 of the first protrusion 27 is an integral bevel.

It can be seen that in actual applications, there are many ways to set the inclined surface, and as long as they do not violate the concept of the invention of the present invention, they are all within the protection scope of the present invention.

Some embodiments of the present invention provide a treatment system including a series of dental appliances, including a series of dental appliances, which progressively implement a treatment plan for patients with maxillary and mandibular teeth, the series of dental appliances including: a first group of appliances, at least one dental appliance in the first group of appliances is a first type of dental appliance, and the first type of dental appliance is the above-mentioned dental appliance.

Other embodiments of the present invention provide another orthodontic system, including a series of dental appliances that are progressively applied to a treatment plan for a patient having maxillary teeth and mandibular teeth, the series of dental appliances including: a first group of appliances applied in a first stage of the treatment plan, and a second group of appliances applied in a second stage of the treatment plan.

In some embodiments, at least one dental appliance in the first group of dental appliances is a first type of dental appliance, and the first type of dental appliance is the dental appliance mentioned in any of the above embodiments.

In some embodiments, at least one dental appliance in the second group of orthodontic appliances is a second type of dental appliance, comprising: a third shell-shaped body and a fourth shell-shaped body for accommodating maxillary teeth and mandibular teeth, respectively; the third shell-shaped body protrudes toward the jaw at a position corresponding to the posterior teeth area and is provided with a third protrusion for adjusting the relative position relationship between the upper and lower jaws; the fourth shell-shaped body protrudes toward the jaw at a position corresponding to the posterior teeth area and is provided with a third protrusion for adjusting the relative position relationship between the upper and lower jaws; A fourth protrusion is provided in the jaw direction for adjusting the relative position relationship between the upper and lower jaws. The third protrusion includes a third action surface, and the fourth protrusion includes a fourth action surface. When the third action surface and the fourth action surface interact with each other, the third protrusion and the fourth protrusion are guided to move relative to each other to adjust the jaw relationship between the upper and lower jaws, and the actual sagittal movement of the lower jaw teeth is equal to the preset movement.

In some embodiments, at least two dental appliances in the first set of appliances are dental appliances of the first type. For example, all dental appliances in the first set of appliances are dental appliances of the first type.

In some embodiments, the height of each first protrusion and each second protrusion in each first-class dental appliance satisfies: the height of each first protrusion and each second protrusion in the first-class dental appliance implemented later is lower than that of each first protrusion and each second protrusion in the first-class dental appliance implemented earlier. For example, as shown in FIG. 13a and FIG. 13b, the protrusions of the upper and lower jaws are synchronously lowered during the lowering, from height H1 to height H2. The height of the upper and lower protrusions is gradually reduced in the treatment plan defined in the first stage, so that after the upper and lower jaw positions gradually tend to be normal in the new occlusal stability relationship, the interference of the upper and lower protrusions on the occlusion can be minimized. In actual application, 10 first-type dental appliances are taken as an example for explanation, and the heights of the protrusions in the 10 dental appliances decrease successively.

In some embodiments, the first stage corresponds to a time period earlier than the second stage in the treatment plan. For example, in some correction systems, the first type of dental appliance that has been corrected can be used before the conventional dental appliance. Through correction, the condylar joints of the mandibular teeth are fully stimulated during the correction process, promoting or inhibiting the development of the maxillary bone. At the same time, the second type of dental appliance is used to maintain the correction goal of the first type of dental appliance, so that the upper and lower jaw teeth in the new occlusal balance system are stably occluded in the target position as much as possible, thereby improving the expression rate of the correction plan.

In some embodiments, the first stage corresponds to a later time in the treatment plan than the second stage. For example, in some correction systems, the first type of dental appliances that can achieve correction are used later than conventional dental appliances. After the initial correction effect is not up to standard, the dental appliances that can achieve correction are used for compensatory correction, further improving the expression rate of the correction plan.

By further limiting the first type of dental appliances that can achieve over-correction in part of the correction system to be used before conventional dental appliances, the condylar joints of the mandibular teeth can be fully stimulated during the correction process to promote or inhibit the development of the maxillary bones. At the same time, the second type of dental appliances can be used to maintain the correction goals of the first type of dental appliances, and the upper and lower jaw teeth can be stably occluded in the target position in the new occlusal balance system as much as possible, thereby improving the expression rate of the correction plan. In addition, it is further limited that the first type of dental appliances that can achieve correction in some correction systems are used later than conventional dental appliances. When the initial correction effect is not up to standard, the dental appliances that can achieve correction are used for compensatory correction, thereby further improving the expression rate of the correction plan.

In some embodiments, at least two dental appliances in the second group of dental appliances are second-class dental appliances, and the height of each third protrusion and each fourth protrusion in each second-class dental appliance satisfies: each third protrusion and each fourth protrusion in the second-class dental appliance implemented later is lower than each third protrusion and each fourth protrusion in the second-class dental appliance implemented earlier. For example, in the second-stage treatment plan, the height of the upper and lower protrusions is gradually reduced, so that after the upper and lower jaw positions gradually tend to be normal in the new occlusal stability relationship, the interference of the upper and lower protrusions on the occlusion can be minimized. By further defining the treatment plan in the second phase to gradually reduce the height of the upper and lower projections, the interference of the upper and lower projections on the occlusion can be minimized after the upper and lower jaw positions gradually return to normal in the new occlusal stability relationship.

In some other embodiments, the treatment plan further includes a third stage, and the series of dental appliances further includes: a third group of dental appliances used in the third stage of the treatment plan, the third stage corresponds to a later time than the first stage in the treatment plan, and at least one dental appliance in the third group of dental appliances is a second-class dental appliance. For example, the treatment plan includes a third stage to be implemented, and the third stage includes a second-class dental appliance, which is used later than the first-class dental appliance, to achieve maintenance treatment after correction, fully exercise the movement of the masticatory muscles, and reduce the possibility of recurrence.

Other embodiments of the present invention provide a treatment system including a series of dental appliances that progressively implement a treatment plan for a patient having maxillary and mandibular teeth, at least some of the series of dental appliances being any of the dental appliances in some of the above embodiments.

In some embodiments, a series of dental appliances have geometric shapes that gradually reposition teeth from an initial position to a target correction position. In some embodiments, each α ₂ in some dental appliances: α ₂ gradually increases as the treatment plan progresses until it is equal to α ₁ . As shown in FIG. 14 , the sharp angle of the second bevel 2412 relative to the jaw plane gradually increases from α ₂₁ to α ₂₂ , and then to α ₂₃ , and finally α ₂₃ = α ₁ .

By gradually increasing the tilt angle, the position of the relationship between the upper and lower jaws is gradually restored to the preset movement. After a period of stimulation, the stimulation is gradually reduced. At the same time, the patient's masticatory muscle stretching training is maintained during the occlusion process to maintain the previous correction effect so that the final treatment position can achieve the desired goal.

In some embodiments, the inclination angle design of the second inclined plane is different from the above embodiments, and as the treatment plan progresses, _α2 gradually decreases from _α1 until it is equal to a preset angle, and the preset angle is greater than or equal to 15 degrees. Again, using FIG. 14 as an example, the inclination angle of the second inclined plane gradually decreases from _α23 , which is the same as _α1 , until it decreases to _α21 . In actual application, it may be found that the orthodontic expression rate is insufficient after a period of treatment. At this time, the patient may need compensatory correction. In this case, the actual movement of the mandible in this embodiment can be lengthened by reducing the inclination angle of the second bevel. Increasing the movement of the mandible can increase the compensation stage during the treatment process, so as to improve the final treatment expression rate.

In some embodiments, the inclination angle of the second bevel gradually decreases to α ₂₁ , and then increases to α ₁ , that is, increases to the same inclination angle as the first bevel. After the compensation stage is completed, the overall bevel can be used to maintain the correction effect to help the jaw relationship stabilize in the new occlusal position. For example, after the compensation correction of the occlusal position adjustment by over-correction, some dental appliances are used to maintain the jaw position adjustment, fully exercise the movement of the masticatory muscles, and reduce the possibility of recurrence.

In some embodiments, the height of each first protrusion and each second protrusion in some dental appliances meets the requirement that: the height of each first protrusion and each second protrusion in a first type of dental appliance implemented later is lower than that of each first protrusion and each second protrusion in a first type of dental appliance implemented earlier, for example, when lowering, the protrusions of the upper and lower jaws are lowered synchronously.

By further limiting the use of partial dental appliances to compensate for the occlusal position adjustment after correction, the jaw position adjustment can be maintained, the movement of the masticatory muscles can be fully exercised, and the possibility of recurrence can be reduced.

In some embodiments, when undergoing tooth correction, the patient needs to wear a series of dental appliances as described above for correction, wherein the geometrical shape regularity of a series of shell-shaped dental appliances can refer to the above examples. A pair of shell-shaped dental appliances is worn for 7 to 14 days, and a series of shell-shaped dental appliances are provided according to the different case types and complexity of the patient to achieve the correction effect.

Some other embodiments of the present invention provide a method for designing a dental appliance, as shown in FIG15, specifically comprising: Step S1, obtaining a first initial digital model of the jaw and a second initial digital model of the jaw. Step S2, respectively designing a first raised portion model and a second raised portion model on the occlusal surface of the posterior teeth area of the first initial digital model of the jaw and the second initial digital model of the jaw; Step S3, based on the first initial digital model of the jaw, the second initial digital model of the jaw, the first raised portion model and the second raised portion model, generating a first digital model of the jaw and a second digital model of the jaw with a digitized raised portion; Step S4, designing a dental appliance based on the first digital model of the jaw and the second digital model of the jaw with a digitized raised portion.

In some embodiments, the first raised portion model includes a first action surface, and the second raised portion model includes a second action surface. When the first action surface and the second action surface interact with each other, the first raised portion model and the second raised portion model are guided to move relative to each other to adjust the intermandibular relationship between the maxillary teeth and the mandibular teeth, and the actual sagittal movement of the mandibular teeth exceeds the preset movement, so that the condylar joint of the mandibular teeth is stimulated to promote or inhibit the development of the maxillary bone.

In some embodiments, the difference between the actual movement of the mandibular teeth in the sagittal plane and the preset movement is less than or equal to 5 mm. By limiting the actual movement of the mandibular teeth to within 5 mm of the preset movement, the user's comfort and the treatment effect are taken into account as much as possible during the treatment process, while avoiding uncontrollable factors caused by excessive treatment.

In some embodiments, one of the first and second action surfaces includes a first inclined surface and a second inclined surface, the first inclined surface is arranged close to the opposite jaw, the end of the second inclined surface close to the first inclined surface is connected to the end of the first inclined surface far from the opposite jaw, and the end of the second inclined surface close to the surface of the corrector is the end of the corresponding action surface close to the surface of the corrector; wherein, the sharp angle _α1 between the first inclined surface and the jaw plane is greater than the sharp angle _α2 between the second inclined surface and the jaw plane.

Correspondingly, the other of the first and second action surfaces is an integral inclined surface, and a sharp angle α ₃ with the jaw plane is greater than or equal to α ₂ and less than or equal to α ₁ .

In some embodiments, an end of the second inclined surface close to the first inclined surface is connected to an end of the first inclined surface far from the opposite jaw in an arc shape.

It is necessary to further explain that in some embodiments, the first action surface and the second action surface are an integral inclined surface, and when the sharp angles of the first action surface and the second action surface relative to the jaw plane are different, the sharp angle of the smaller action surface relative to the jaw plane is α ₄ , and α ₄ is less than or equal to 65 degrees and greater than or equal to 15 degrees. For example, α ₄ is less than or equal to 45 degrees and greater than or equal to 15 degrees.

In some embodiments, the first action surface and the second action surface are an integral inclined surface, and when the sharp angles of the first action surface and the second action surface relative to the jaw plane are the same, the sharp angle relative to the jaw plane is α ₅ , and α ₅ is less than or equal to 65 degrees and greater than or equal to 15 degrees. For example, α ₅ is less than or equal to 45 degrees and greater than or equal to 15 degrees.

In some embodiments, the length of the first protrusion in the proximal-distal direction is greater than the length of the second protrusion in the proximal-distal direction.

In some embodiments, the first action surface is located at the mesial side of the first protrusion, and the second action surface is located at the distal side of the second protrusion. When the first action surface and the second action surface interact with each other, the second protrusion is guided to move forward in the sagittal direction, so that the condylar joint of the mandibular teeth is stimulated, the development of the mandibular bone is promoted, and the development of the maxillary bone is inhibited. By limiting the positional relationship between the action surface and the protrusion, the mandible can be accurately guided forward to improve the expression rate of the treatment plan. In some embodiments, the first protrusion is within the range of tooth positions 4 to 6 in the upper jaw, and the second protrusion is within the range of tooth position 5 in the lower jaw.

In some embodiments, the second action surface is located at the mesial side of the second protrusion, and the first action surface is located at the distal side of the first protrusion. When the first action surface and the second action surface interact with each other, the second protrusion is guided to move upward and backward in the sagittal direction, so that the condylar joint of the mandibular teeth is stimulated and the development of the maxillary bone is promoted. By limiting the positional relationship between the action surface and the protrusion, the mandibular direction can be accurately guided, thereby improving the expression rate of the treatment plan.

In some embodiments, the preset movement amount is the sagittal movement of the mandibular teeth required to achieve the patient's treatment goal.

In some embodiments, the first shell-shaped body includes two first protrusions, and the two first protrusions belong to the same tooth position; the second shell-shaped body includes two second protrusions, and the two second protrusions belong to the same tooth position. By limiting the upper and lower protrusions to two respectively, and symmetrically arranged at the tooth positions, the occlusal stability is improved during occlusion.

In addition, it should be noted that the features of the dental appliance in the foregoing embodiments of the present invention can all be provided in the design methods in the above embodiments, and will not be described again here to avoid repetition.

Some embodiments of the present invention provide a method for preparing a dental appliance. In some embodiments, a 3D direct printing method or a hot pressing method can be used to prepare a dental appliance designed by the design method of the dental appliance in the above embodiments.

In some embodiments, the specific manufacturing process can be to use a 3D printing method to print and manufacture the digital model of the designed shell-shaped dental appliance. This method prints at the same time in the printing stage, without unnecessary processes, and the dental appliance obtained is also strong. The additive manufacturing method in this embodiment can be SLA (Stereo lithography Appearance) printing or DLP (Digital Light Processing) printing. Other 3D printing technologies can also be used in actual applications, which will not be listed here one by one.

In some embodiments, the integrated structure of the dental appliance can also be obtained by hot pressing film forming technology. The specific hot pressing film forming process generally includes: 3D printing based on the corresponding digital maxillary model and a series of intermediate digital maxillary models to produce a solid maxillary model, and then a membrane is used to hot press the above-mentioned solid maxillary model to obtain a shell-shaped dental appliance containing a tooth shape, and then the shell-shaped dental appliance containing a tooth shape is cut along the gum line or adjacent to the gum line to obtain a shell-shaped dental appliance that can accommodate teeth.

It is worth mentioning that the features of the dental appliance in the previous embodiments of the present invention can all be provided in the preparation method in the present embodiment, and will not be described again here to avoid repetition.

Those skilled in the art will appreciate that the above embodiments are specific embodiments of the present invention, and that various changes may be made in form and detail in actual applications without departing from the spirit and scope of the present invention.

S1~S4: Step 1: Maxilla 2: Mandible 10: Maxilla teeth 12: Posterior teeth 14, 15: Premolars 16, 17: Molars 20: First shell body 21, 22, 23, 24, 25, 26, 27: First protrusion 30: Mandibular teeth 40: Second shell body 41, 42, 43, 44, 45, 46, 47: Second protrusion 211, 221, 231, 241, 251, 261, 271: First Action surface 212, 412: contact surface 222, 422: sawtooth action surface 242: reinforcement structure 2411, 2611, 4511, 4711: first inclined surface 2412, 2612, 4512, 4712: second inclined surface 411, 421, 431, 441, 451, 461, 471: second action surface a, b, c: position H1, H2: height S, S1, S2: movement Y1, Y2: direction α ₁ ~ α _{6 ,} α ₂₁ ~ α ₂₃ : sharp angle

One or more embodiments are exemplarily illustrated by the corresponding pictures in the accompanying drawings, and these exemplarily illustrated pictures do not constitute limitations on the embodiments. Figure 1 is a schematic diagram of the relationship between the dental appliance and the jaw in an embodiment of the present invention; Figures 2a and 2b are schematic diagrams of the movement of the protrusion in an embodiment of the present invention; Figure 3a is a schematic diagram of the dental appliance in another embodiment; Figure 3b is a simplified schematic diagram of the first protrusion and the second protrusion in Figure 3a; Figure 4 is a schematic diagram of the dental appliance in an embodiment of the present invention after wearing; Figure 5 is a schematic diagram of another dental appliance in another embodiment of the present invention after wearing; Figure 6a is a schematic diagram of another dental appliance in an embodiment of the present invention after wearing; Figure 6b is a simplified schematic diagram of the first protrusion and the second protrusion in Figure 6a; Figure 7a is a schematic diagram of a dental appliance in another embodiment of the present invention after wearing; Figure 7b is a simplified schematic diagram of the first protrusion and the second protrusion in Figure 7a; Figure 8 is a schematic diagram of another dental appliance in another embodiment of the present invention after being worn; Figure 9 is a schematic diagram of another dental appliance in another embodiment of the present invention after being worn; Figure 10 is a schematic diagram of another dental appliance in a worn state in an embodiment of the present invention; Figure 11 is a flow chart of a design method of a dental appliance with a reinforced structure in another embodiment of the present invention; Figure 12 is a schematic diagram of the occlusal surface of another dental appliance in another embodiment of the present invention; Figures 13a and 13b are schematic diagrams of the change in the wearing effect of the correction system in another embodiment of the present invention; Figure 14 is a schematic diagram of the change in the angle of inclination of the inclined surface of another correction system in another embodiment of the present invention; Figure 15 is a flow chart of a design method of a dental appliance in another embodiment of the present invention.

1: Upper jaw

2: Lower jaw

10: Upper jaw teeth

20: The first shell-shaped body

21: First protrusion

30: Mandibular teeth

40: Second shell-shaped body

41: Second raised portion

Claims (33)

A dental appliance comprises: a first shell-shaped body and a second shell-shaped body respectively used to accommodate upper jaw teeth and lower jaw teeth, wherein the first shell-shaped body is provided with a first protrusion for adjusting the relative position relationship between the upper and lower jaws at a position corresponding to the posterior teeth area, and the second shell-shaped body is provided with a second protrusion for adjusting the relative position relationship between the upper and lower jaws at a position corresponding to the posterior teeth area. The first protrusion includes a first action surface, and the second protrusion includes a second action surface. When the first action surface and the second action surface interact with each other, the first protrusion and the second protrusion are guided to move relative to each other to adjust the inter-mandibular relationship between the maxillary teeth and the mandibular teeth, and the actual sagittal movement of the mandibular teeth exceeds the preset movement, so that the condylar joint of the mandibular teeth is stimulated to promote or inhibit the development of the maxillary bones. A dental appliance as described in claim 1, wherein the difference between the actual sagittal movement of the mandibular tooth and the preset movement is less than or equal to 5 mm. A dental appliance as described in claim 1, wherein one of the first and second active surfaces comprises a first bevel and a second bevel, the first bevel is arranged close to the opposite jaw, the end of the second bevel close to the first bevel is connected to the end of the first bevel far from the opposite jaw, and the end of the second bevel close to the appliance surface is the end of the active surface close to the appliance surface; wherein the sharp angle _α1 between the first bevel and the jaw plane is greater than the sharp angle _α2 between the second bevel and the jaw plane. The dental appliance as described in claim 3, wherein the other of the first and second active surfaces is an integral inclined surface, and the sharp angle _α3 with the jaw plane is greater than or equal to _α2 and less than or equal to _α1 . A dental appliance as described in claim 3, wherein α ₁ is less than or equal to 75 degrees and greater than or equal to 65 degrees. A dental appliance as described in claim 3, wherein _α2 is less than or equal to 70 degrees and greater than or equal to 15 degrees. A dental appliance as described in claim 3, wherein the difference between _α1 and _α2 is greater than or equal to 5 degrees and less than or equal to 45 degrees. A dental appliance as described in claim 3, wherein the end of the second bevel close to the first bevel is arc-connected to the end of the first bevel away from the opposite jaw. A dental orthodontic appliance as described in claim 1, wherein the first active surface and the second active surface are an integral inclined surface, and when the sharp angles of the first active surface and the second active surface relative to the jaw plane are different, the sharp angle of the smaller active surface relative to the jaw plane is _α4 , and _α4 is less than or equal to 65 degrees and greater than or equal to 15 degrees; when the sharp angles of the first active surface and the second active surface relative to the jaw plane are the same, the sharp angle relative to the jaw plane is _α5 , and _α5 is less than or equal to 65 degrees and greater than or equal to 15 degrees. A dental appliance as described in claim 9, wherein _α4 is less than or equal to 45 degrees and greater than or equal to 15 degrees; or, _α5 is less than or equal to 45 degrees and greater than or equal to 15 degrees. A dental appliance as described in claim 1, wherein the length of the first protrusion in the mesial-distal direction is greater than the length of the second protrusion in the mesial-distal direction. A dental orthodontic appliance as described in any one of claims 1 to 11, wherein the first active surface is located on the mesial side of the first protrusion, and the second active surface is located on the distal side of the second protrusion, and when the first active surface and the second active surface interact with each other, the second protrusion is guided to move forward in the sagittal direction so that the condylar joint of the mandibular tooth is stimulated, thereby promoting the development of the mandibular bone. A dental appliance as described in claim 12, wherein the first raised portion is within the range of tooth positions 4 to 6 in the upper jaw, and the second raised portion is within the range of tooth position 5 in the lower jaw. A dental orthodontic appliance as described in any one of claims 1 to 11, wherein the second active surface is located on the mesial side of the second protrusion, and the first active surface is located on the distal side of the first protrusion, and when the first active surface and the second active surface interact with each other, the second protrusion is guided to move upward and backward in the sagittal direction so that the condylar joint of the mandibular tooth is stimulated, thereby promoting the development of the maxillary bone. A dental appliance as described in claim 1, wherein the first active surface is provided with a first stabilizing portion, and the second active surface is provided with a second stabilizing portion, and when occluding, the first stabilizing portion and the second stabilizing portion interact with each other to enable the upper and lower jaws to be stably occluded at a preset position. A dental appliance as described in claim 15, wherein the first stabilizing portion and the second stabilizing portion are friction structures formed on the first active surface and the second active surface, or the first stabilizing portion and the second stabilizing portion are concave-convex matching structures formed on the first active surface and the second active surface. A dental appliance as described in claim 16, wherein the concave-convex matching structure is a saw-like structure arranged on the first active surface and the second active surface. A dental appliance as described in claim 1, wherein the mechanical strength of the first protrusion and/or the second protrusion is greater than the mechanical strength of other parts of the shell-shaped body. A dental appliance as described in claim 18, wherein the buccal side and/or lingual side of the first protrusion and/or the second protrusion is provided with a reinforcing structure, and the reinforcing structure is formed by the buccal side and/or lingual side of the first protrusion protruding outward or recessing inward. A dental appliance as described in claim 1, wherein the surface of the first protrusion and/or the second protrusion facing the opposing tooth row is a contact surface, and the structure of the contact surface is a concave-convex structure with the same anatomical features as the occlusal surface of the opposing teeth. A dental appliance as described in claim 1, wherein the first protrusion and/or the second protrusion is formed by a protrusion of the occlusal surface of the shell-shaped body toward the jaw, or is formed by a thickening of the occlusal surface of the shell-shaped body toward the jaw. A dental appliance as described in claim 1, wherein the preset movement amount is the sagittal movement amount of the mandibular teeth required to achieve the patient's treatment goal. A dental appliance as described in claim 1, wherein the first shell-shaped body includes two first protrusions, and the two first protrusions belong to the same tooth position; the second shell-shaped body includes two second protrusions, and the two second protrusions belong to the same tooth position. A treatment system, characterized in that it includes a series of dental appliances that progressively implement a treatment plan for a patient having maxillary and mandibular teeth, the series of dental appliances comprising: a first group of appliances, at least one dental appliance in the first group of appliances being a first type of dental appliance, the first type of dental appliance being a dental appliance as described in any one of claims 1 to 23. The orthodontic system as described in claim 24, wherein the first set of orthodontic appliances is used to implement the first stage of the treatment plan, and the orthodontic system further includes: a second set of orthodontic appliances used in the second stage of the treatment plan, wherein at least one dental orthodontic appliance in the second set of orthodontic appliances is a second type of dental orthodontic appliance, including: a third shell-shaped body and a fourth shell-shaped body respectively used to accommodate the upper jaw teeth and the lower jaw teeth, the third shell-shaped body protruding in the position corresponding to the posterior teeth area toward the opposite jaw direction and having a third protrusion for adjusting the relative position relationship between the upper and lower jaws, and the fourth shell-shaped body protruding in the position corresponding to the posterior teeth area toward the opposite jaw direction and having a The fourth protrusion is used to adjust the relative position relationship between the upper and lower jaws. The third protrusion includes a third action surface, and the fourth protrusion includes a fourth action surface. When the third action surface and the fourth action surface interact with each other, the third protrusion and the fourth protrusion are guided to move relative to each other to adjust the inter-jaw relationship between the upper jaw teeth and the lower jaw teeth, and the actual movement amount of the lower jaw teeth in the sagittal direction is equal to the preset movement amount. A treatment system as described in claim 25, wherein at least two dental appliances in the second group of appliances are second-class dental appliances, and the height of each third protrusion and each fourth protrusion in each second-class dental appliance satisfies: the height of each third protrusion and each fourth protrusion in the second-class dental appliance implemented later is lower than the height of each third protrusion and each fourth protrusion in the second-class dental appliance implemented earlier. A treatment system as described in claim 25, wherein, when the first stage corresponds to a later time in the treatment plan than the second stage, the series of dental appliances further includes: a third group of dental appliances for use in a third stage in the treatment plan, the third stage corresponding to a later time in the treatment plan than the first stage, and at least one dental appliance in the third group of dental appliances is a dental appliance of the second type. A correction system as described in claim 25, wherein the time corresponding to the first stage in the treatment plan is earlier than the second stage; or, The time corresponding to the first stage in the treatment plan is later than the second stage. A treatment system as described in claim 24, wherein at least two dental appliances in the first group of dental appliances are of the first type. A treatment system as described in claim 24, wherein the height of each first protrusion and each second protrusion in each first-class dental appliance satisfies: the height of each first protrusion and each second protrusion in the first-class dental appliance implemented later is lower than the height of each first protrusion and each second protrusion in the first-class dental appliance implemented earlier. A treatment system, characterized in that it includes a series of dental appliances that gradually implement a treatment plan for a patient with maxillary and mandibular teeth, at least part of the series of dental appliances are the dental appliances described in any one of claims 3 to 8, and each of the _α2s in the part of the dental appliances: as the treatment plan progresses, the _α2 gradually increases until it is equal to the _α1 ; or, as the treatment plan progresses, the _α2 gradually decreases from the _α1 until it is equal to a preset angle, and the preset angle is greater than or equal to 15 degrees. A correction system as described in claim 31, wherein each α ₂ in the partial dental appliance gradually decreases to be equal to the preset angle as the treatment plan proceeds, and then increases to α ₁ . A treatment system as described in claim 31, wherein the height of each of the first protrusions and each of the second protrusions in the portion of the dental appliances satisfies: the height of each of the first protrusions and each of the second protrusions in the dental appliance implemented later is lower than the height of each of the first protrusions and each of the second protrusions in the dental appliance implemented earlier.