KR100597389B1 - Fixture for a dental implant, dental implant, impression coping and lab analog for the dental implant - Google Patents

Abstract

DETAILED DESCRIPTION Dental implant fixtures and dental implant related products are disclosed that can stably fix a superstructure and be used for multipurpose purposes. The dental implant fixture is formed in a polygonal column shape and has an external engaging protrusion formed at a predetermined depth in the center with a first screw hole for engaging an abutment, a flange provided at a lower end of the external engaging protrusion, and a flange It is provided at the lower end and formed integrally with the flange and includes a fixture body formed on the outer surface of the tissue binding portion, the flange includes an internal engaging groove formed along the periphery of the outer engaging projection, the flange and the end of the upper surface and the internal A support surface having a predetermined width is formed between the coupling grooves to support the bottom surface of the abutment. Since the external coupling protrusion corresponds to the conventional abutment, it can be applied to the conventional abutment, and preferably, by using the abutment including an internal coupling protrusion corresponding to the internal coupling groove. And the crown structure can be fixed more stably.

Implant, Abutment, Outer Combination, Inner Combination

Description

FIXTURE FOR A DENTAL IMPLANT, DENTAL IMPLANT, IMPRESSION COPING AND LAB ANALOG FOR THE DENTAL IMPLANT}

1 is a cross-sectional view illustrating a conventional externally coupled implant.

Figure 2 is a cross-sectional view for explaining another conventional externally coupled implant.

3 is a cross-sectional view illustrating a conventional internally coupled implant.

4 is a perspective view illustrating a fixture for a dental implant according to a first embodiment of the present invention.

5 is a plan view of a fixture for a dental implant according to the first embodiment.

6 is an exploded front view showing a fixture and an implant according to the first embodiment.

7 is a cross-sectional view illustrating a state in which an implant is fastened according to the first embodiment.

8A and 8B are plan views illustrating fixtures according to other embodiments of the present invention.

9 is a plan view and a sectional view illustrating another fixture according to another embodiment of the present invention.

10 is an exploded front view for explaining a dental implant according to a second embodiment of the present invention.

11 is a perspective view of an impression coping according to a third embodiment of the present invention.

12 is a perspective view of a lab analogue according to a third embodiment.

FIG. 13 is a partial cross-sectional view showing a state in which the impression coping and the lap analog are bound together according to the third embodiment.

<Explanation of symbols for the main parts of the drawings>

100: implant 110: fixture

120: fixture body 130: extruding engaging protrusion

140: flange 142: internal coupling groove

144 ： Ground 146 ： Margin

150: abutment 152: internal coupling protrusion

154 ： External combined groove

FIELD OF THE INVENTION The present invention relates to implants, and more particularly, fixtures and dental implants that can more stably fix abutments or intermediate abutments and are compatible with other abutments. It is about.

A dental implant generally refers to an artificial dental structure formed by implanting a fixture, which is an artificial root, in a part or whole of a missing tooth and attaching it to the alveolar bone and fixing the prosthesis to the artificial root. do. In addition, the term implant may be broadly used as a comprehensive concept including such a dental procedure, and may be narrowly used as the same meaning as a fixture. In the present specification, an implant may be interpreted mainly as a general artificial tooth structure.

In general, implants include a fixture made of titanium, an abutment fixed on the fixture, an abutment screw fixing the abutment to the fixture, and an abutment fixed to the abutment. It consists of a crown as an artificial tooth.

The implant can be performed only on the lost part without damaging adjacent teeth or surrounding tissues around the lost tooth, supporting bone tissue, delaying the absorption of bone tissue and providing the same chewing power as natural teeth. And in appearance can form almost the same aesthetics as natural teeth.

Therefore, implants have recently been widely used as a dental procedure for repairing damaged or lost teeth.

Such implants may be classified into an external connection-type implant and an internal connection-type implant according to the coupling method between the fixture and the abutment.

Externally Implantable Implants

The externally-coupled implant includes a fixture, abutment and crown, and a connection projection is formed on the upper surface of the fixture and a connection groove for a fit with the coupling protrusion on the bottom of the abutment. groove or cavity) is formed. In general, the engaging projection and the coupling groove is formed in a circular (circular) or non-circular (non-circular), the center is formed with a screw hole for the abutment screw. In particular, in the case of using non-circular coupling protrusions and coupling grooves such as hexagonal or octagonal, the coupling protrusions can prevent relative rotation between the fixture and the abutment, and It also assists in easily reorienting when repositioning. Externally coupled implants have been in use since the earliest stages of implants, and are the most commonly used method, with many designs of implants and many clinical results.

1 is a cross-sectional view illustrating a conventional externally coupled implant.

Referring to FIG. 1, the implant 10 uses a UCLA abutment and is due to a screw retained prosthesis. The implant 10 includes a fixture 12, an abutment 14, and a crown 18, wherein the fixture 12 is placed in the alveolar bone and the abutment 14 is associated with the crown 18. It is integrally fixed on the fixture 12.

An external projection 13 is formed on an upper surface of the fixture 12. The external coupling protrusion 13 is formed in a hexagonal column shape, and a screw hole is provided at the center of the external coupling protrusion 13. In addition, an outer engaging groove 15 is provided on the bottom of the abutment 14 in response to the outer engaging projection 13. Since the external coupling groove 15 is formed in a hexagon corresponding to the external coupling protrusion 13, the external coupling groove 15 is snugly fit to the external coupling protrusion 13.

Before fixing the abutment 14 to the fixture 12, the abutment 14 and the crown 18 are integrally processed, and a hole penetrating the center of the abutment 14 and the crown 18 is formed. Screw 16 is fastened with fixture 12 through. The crown 18 and the abutment 14 are fixed to the fixture 12 by fastening the screw 16 to the fixture 12.

Figure 2 is a cross-sectional view for explaining another conventional externally coupled implant.

Referring to FIG. 2, the implant 20 is a transmucosal abutment, and may be referred to as an externally coupled implant. The implant 20 of FIG. 2 includes a fixture 22, a middle abutment 24 and an upper abutment 26 and a crown 28. The upper abutment 26 is integral with the crown 28 and is disposed on the intermediate abutment 24.

An outer coupling protrusion 23 including a screw hole is formed on the upper surface of the fixture 22, and an external coupling groove 25 for the external coupling protrusion 23 is formed in the intermediate abutment 24. do.

The intermediate abutment 24 includes a hole corresponding to the first screw 24-1, and the first screw 24-1 is engaged with the fixture 22 through the intermediate abutment 24. The intermediate abutment 24 can be fixed to the fixture 22.

The second screw 26-1 is inserted through a hole through the crown 28 and the upper abutment 26, and the second screw 26-1 is placed on top of the first screw 24-1. The crown 28 and the upper abutment 26 are fixed to the intermediate abutment 24 by binding to the formed screw hole. A coupling groove 27 corresponding to the head of the first screw 24-1 is formed at the bottom of the upper abutment 26.

1 and 2, in the externally coupled implant, the external coupling protrusion formed on the upper surface of the fixture and the external coupling groove formed on the bottom of the abutment are closely attached to each other to bind the abutment and the fixture together. In general, the externally coupled implant is manufactured by the Branemark method, 3i method, etc., the coupling protrusion and the coupling groove has a straight hexagonal column shape having a height of about 0.7mm and a width of about 2.7mm.

Since the height of the coupling protrusion is small, the external coupling protrusion is worn out quickly, or the coupling between the external coupling protrusion and the coupling groove is loose, there is a problem that the abutment can be easily removed. In order to solve this problem, the height of the coupling protrusion may be manufactured to 1 mm or more, or the coupling protrusion may be manufactured in an octagonal or spline shape, but the above problems may not be completely overcome. This approach is particularly rejected by many dentists because of the lack of abutment compatibility. In addition, loosening of screws or fracture of screws often occur.

Internal Implantable Implants

Internally coupled implants also include fixtures, abutments and crowns. However, a coupling groove is formed on the upper surface of the fixture, not a coupling protrusion, and a coupling protrusion corresponding to the coupling groove is formed on the bottom of the abutment. This is the opposite of the externally-bonded implant. By forming a long space above the fixture, it is possible to form a wider area of the fixture and abutment contact. In general, the coupling protrusion and the coupling groove is formed in a circular (circular) or non-circular (non-circular), the center is formed with a hole for the abutment screw. Internally coupled implants are intended to overcome some of the shortcomings of externally coupled implants, which allows the formation of large mating areas within the fixture and the ability to reliably support abutments using relatively large areas. have.

3 is a cross-sectional view illustrating a conventional internally coupled implant. 3, two types of internally coupled implants are shown, denoted by (a) and (b), respectively.

Referring to FIG. 3A, the internally coupled implant is composed of a fixture 42, an internally coupled abutment 44, a screw 46 and a crown 48. The fixture 42 includes a coupling groove 43 formed at an upper end portion, and the abutment 44 includes a coupling protrusion 45 corresponding to the coupling groove 43. Coupling protrusion 45 is formed at the lower end of the body of the abutment 44, the upper support surface for contacting and supporting the crown 48 is formed on the upper portion of the body of the abutment 44.

The coupling groove of the fixture 42 includes a conical pillar-shaped groove located at the inlet side and a hexagonal or octagonal groove formed at the bottom thereof, and the coupling protrusion 45 of the abutment 44 is a coupling groove. A conical pillar-shaped fit portion 45a and an anti-rotation portion 45b having a hexagonal or octagonal pillar shape are provided to correspond to the shape of the conical pillar. As the engaging protrusion 45 of the abutment 44 is inserted into the fixture 42, the contact part 45a supports the body of the abutment 44, and the rotation preventing part 45b is located below the coupling groove. And prevent the abutment 44 from rotating relative to the fixture 42.

Referring to FIG. 3B, the internally coupled implant is composed of a fixture 52, an internally coupled abutment 54, a screw 56 and a crown 58. The fixture 52 includes a coupling groove 53 at an upper end thereof, and a coupling protrusion 55 is provided on a bottom surface of the abutment 54 corresponding to the coupling groove 53.

In the conventional fixture 52, the coupling groove 53 is formed as a column-shaped groove having a cylindrical or polygonal cross section, and the coupling protrusion 55 of the abutment 54 corresponding thereto is also in a cylindrical or prismatic shape. Is formed. In particular, when using a cylindrical engaging projection may be formed with a projection or groove to limit the rotation between the coupling projection and the coupling groove.

As shown in (a) and (b) of FIG. 3, since the coupling protrusion and the coupling groove are formed in a columnar shape in the structure of the internally coupled implant, they are supported in contact with a large area, and the loosening of the screw is almost There is no need, and there is an advantage that the implant can be completed in a single operation. However, in order to separate the abutment from the fixture, the abutment must retreat in the axial direction, and the distance to move in the axial direction is also quite long. Therefore, internally coupled implants are mainly used for the purpose of restoring one tooth, but they are rarely used because they have many difficulties and limitations when splinting and repairing three or more consecutively damaged teeth. .

In addition, ITI method is commonly used for internally coupled implants, but there is a disadvantage in that the choice is not as diverse as externally coupled implants, and compatibility is drastically deteriorated because each manufacturer adopts a unique shape. Has a problem.

In addition, US Patent No. 6,419,492 describes a dental implant system. The implant system also includes fixtures and abutments.

The fixture of the dental implant system includes a head portion and a body portion, and the head portion includes a space including a tapered sidewall. An anchoring post protrudes from the bottom of the head space, and indexing means is formed at the end of the anchoring post.

The abutment also includes first and second spaces connected up and down, and the abutment also has a tapered shape corresponding to the sidewall of the space formed in the head of the fixture. Accordingly, the lower portion of the abutment is tightly fixed to the head of the fixture while the first space located below receives the fixing pillar.

The fixing pillar and the guide means in the fixture are for preventing relative rotation of the abutment, and are formed in the center of the space of the head portion. However, the fixture is to rotate the anti-rotation part inward based on the internal coupling type connection method, the reverse rotation portion 45b of Figure 3 (a) is reversed, rather making the machining more difficult It is only. In addition, the shape and dimensions are different from the existing abutments and fixtures and are therefore not compatible with other products.

As mentioned above, externally-bonded implants are widely used worldwide as their initial form, and are relatively simple to manufacture compared to other methods, and generally have almost standardized shapes and dimensions of fixtures and abutments for excellent compatibility. There is an advantage. However, since the height of the external coupling protrusion is about 0.7 to 1.0 mm, the possibility of detachment of the abutment from the fixture is relatively higher than that of other methods, and the loosening of the screw occurs relatively frequently.

On the other hand, the internally coupled implants have an advantage of increasing the height of engagement and suppression of screw loosening because they form a coupling groove into the fixture, but the choice is not as varied as the externally coupled implants, Each manufacturer adopts its own shape, which leads to a sharp drop in compatibility. In addition, internally coupled implants have many limitations and difficulties for restoring teeth in the form of splints or overdentures.

Accordingly, an object of the present invention is to provide a fixture of a dental implant that can solve the problem of the external coupling method by selecting the advantages of the internal coupling method as a basic external coupling method.

Another object of the present invention is to provide a fixture of a dental implant having a structure in which other conventional externally coupled abutments can equally be used. Therefore, the practitioner can obtain the optimum effect by using the abutment specified in accordance with the present invention, but in the case of repairing by splinting a number of artificial teeth can use the existing 3i or Branemark abutment as it is. In addition, abutments that are perfect for fixtures cannot be obtained, but if 3i or Branemark abutments are available, the compatibility of fixtures can be enhanced by enabling the use of conventional 3i or Branemark abutments. Can be.

It is a further object of the present invention to provide a dental implant having both abutments and fixtures, which includes the advantages of both externally coupled and internally coupled implants and which can overcome the disadvantages of both approaches.

According to a preferred embodiment of the present invention for achieving the above objects, the fixture includes an external engaging projection, a flange, an internal engaging groove and a fixture body.

The fixture body is placed in the alveolar bone or the jaw bone, and is fixed to the bone tissue while being adsorbed with the bone tissue, and serves to support the implant. Typically, the fixture is composed of a titanium alloy and a tissue binding is provided on the outer surface of the fixture body. The tissue binding portion is a portion directly adsorbed with the bone tissue, a thread may be formed, and a porous surface may be formed for excellent adsorption with the tissue.

A flange is provided on the upper part of the fixture body, and an external engaging protrusion formed in a polygonal column shape is provided on the flange. The external coupling protrusion is used to bind the abutment. The outer coupling protrusion is formed in a polygonal column shape such as hexagon or octagon, and a first screw hole fastened to a screw passing through the abutment is formed at a predetermined depth in the center.

In addition, an inner coupling groove is formed along the periphery of the outer coupling protrusion on the upper surface of the flange continuously or discontinuously. The inner coupling protrusion may be formed on the bottom of the abutment corresponding to the internal coupling groove, and the internal coupling protrusion is inserted into the internal coupling groove so that the abutment and the fixture are connected to the external coupling method and the internal coupling method. Can be combined.

Of course, the external coupling protrusion may correspond to an existing external coupling type abutment, and may be fixed to the fixture even with an abutment without an internal coupling protrusion. In particular, the structure of this structure is very economical in that there is no need to purchase a tool because it can use the tools or kits used in the conventional external coupling method even in the process of impression coping or other implants. have.

According to a preferred embodiment of the present invention for achieving the above objects, the dental implant includes an abutment assembly coupled to the upper portion in addition to the fixture. The abutment assembly may be formed of one body, but may also be composed of two bodies consisting of an upper abutment and an intermediate abutment. The abutment assembly includes an external coupling protrusion corresponding to an external coupling groove and an internal defect groove corresponding to the external coupling protrusion of the fixture, and the external coupling groove and the internal coupling protrusion are the abutment assembly. Is formed on the bottom of the. In addition, a second screw hole corresponding to the first screw hole is provided at the center of the abutment assembly. The second screw hole is for passing the screw, and an internal thread may or may not be formed on an inner surface thereof.

The fixture includes an external coupling protrusion and the abutment includes an external coupling groove corresponding thereto to use an existing external coupling method. In addition, the fixture may include an internal coupling groove around the external coupling protrusion, and the abutment may include an internal coupling protrusion to connect the fixture and abutment of the present invention by an internal coupling method. Therefore, by using both coupling methods, it is possible to more stably fix the abutment on the fixture.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the following embodiments.

Example 1

4 is a perspective view for explaining a dental implant fixture according to a first embodiment of the present invention, Figure 5 is a plan view of a dental implant fixture according to the first embodiment.

4 and 5, the fixture 110 includes a fixture body 120, a flange 140, an internal coupling groove 142, and an external coupling protrusion 130. do.

The fixture body 120 is made of a titanium alloy, the outer surface of the body is formed with a thread. Fixture body 120 can be penetrated into the bone tissue by using a screw thread, and after entering the bone tissue is adsorbed with the bone tissue while taking a long time. While being adsorbed into the bone tissue, the fixture body 120 forms a unit with the jawbone and functions to stably support the implant as an artificial tooth root. At this time, in addition to allowing the fixture body 120 to easily enter, the screw thread also functions as a tissue binding part that forms a wide area adsorbed with the bone tissue.

Several recesses may be formed at the end of the fixture body 120 together with the threads. In addition, by forming the porous surface to the fixture body 120, it is possible to maximize the area that can be adsorbed with the bone tissue. For example, in the case of Endopore implants, unlike other implant products that are surface treated with acid corrosion or hydroxyapatite coatings, the surface area of the fixture is maximized by maximizing the surface area of the fixture by sintered surface. The result is a strong bone bond that can be achieved even when the amount of bone is insufficient.

A flange 140 is provided above the fixture body 120, and an external coupling protrusion 130 formed in a polygonal pillar shape is provided above the flange 140. Here, the flange 140 and the outer coupling protrusion 130 are integrally formed with the fixture body 120 and are made of titanium alloy.

The external coupling protrusion 130 is for binding the abutment, and is formed in a polygonal pillar shape such as hexagon or octagon, and the first screw hole 138 is formed at a predetermined depth in the center portion. The external coupling protrusion 130 is for fixing the abutment coupled by an external coupling method and has a height of about 0.7 mm and a width of about 2.7 mm similar to the Branemark implant. The first screw hole 138 may extend up to the fixture body 120 along the axis of the fixture 110, and may be coupled to the screw 160 passing through the abutment 150 while being crowned with the crown (C). The butt 150 can be fixed to the fixture 110.

A circular internal coupling groove 142 is formed on the flange 140 around the outer coupling protrusion 130. The internal coupling groove 142 is formed to a width of about 0.2 ~ 0.5mm and a depth of about 0.6 ~ 1.0mm, it is formed in a circle connected to one.

In addition, a support surface 144 having a predetermined width is formed between an end portion of the upper surface of the flange 140 and the internal coupling groove 142. The support surface 144 is a portion for supporting the bottom surface of the abutment 150 together with the internal coupling groove 142, even if the abutment mounted on the upper portion does not include an internal coupling protrusion. Be able to support the bottom of the.

A margin 146 is provided around the flange 140. Margin portion 146 is formed on the flange 140 of the predetermined size, it is possible to prevent the bone tissue around the fixture 110 to sit first, the internal coupling groove 142 is formed secondary It can provide sufficient sidewalls that can be.

That is, the fixture 110 according to the present embodiment can stably support the abutment having an internal coupling protrusion as described below, but by using a standard used in a Branemark system or a 3i system, The abutment can also be stably supported. When fixing the conventional abutment, the support surface 144 on the upper surface of the flange 140 supports the bottom surface of the abutment.

6 is an exploded front view illustrating a fixture and an implant according to a first embodiment, and FIG. 7 is a cross-sectional view illustrating a state in which an implant according to the first embodiment is fastened.

6 and 7, the implant 100 includes a fixture 110 and an abutment 150. The abutment 150 is a screw retained or cement retained abutment and includes an external engaging groove 154 corresponding to the external engaging protrusion 130 of the fixture 110. In this embodiment, since the outer coupling protrusion 130 is formed in a hexagonal column shape, the outer coupling groove 154 also provides a hexagonal column shape groove. In addition, an inner coupling protrusion 152 is formed on the bottom of the abutment 150 around the entrance of the outer coupling groove 154. The internal coupling protrusion 152 is formed in an annular shape corresponding to the internal coupling groove 142 and protrudes from the bottom of the abutment 150.

A second screw hole 158 connected to the outer coupling groove 154 is formed at the center of the abutment 150, and the screw 160 is formed through the second screw hole 158. 1 is fastened to the screw hole (138). In this case, the abutment 150 may be provided in a state in which the abutment 150 is coupled to the crown C, and may be fixed to the fixture 110 by the screw 160, but only the abutment 150 may be fixed to the screw 160. After fixing to the fixture 110 by, the crown (C) may be fixed to the abutment 150 by cement.

As in the present embodiment, when the height of the external coupling protrusion 130 is about 0.7mm, and the depth of the internal coupling groove 142 is about 0.8mm, the fixture 110 and the abutment 150 Coupling length of the liver can be increased more than two times compared to the conventional.

In addition, the sidewall of the internal coupling groove 142 is formed perpendicular to the top surface of the flange 140, but according to another embodiment of the present invention at least one of the sidewalls is tapered to provide an upward slope It is formed and can be easily adhered and separated by the inclined surface.

8A and 8B are plan views illustrating fixtures according to other embodiments of the present invention.

Referring to FIG. 8A, an internal coupling groove 143 is discontinuously formed on the flange 140. As in the previous embodiment, the internal coupling groove is not continuously formed in a circular shape, but the internal coupling groove 143 according to the present embodiment has a discontinuous shape formed to be broken regularly or irregularly. As shown, since the internal coupling groove 143 is formed discontinuously, the direction in which the abutment is mounted can be easily defined, and the support surface 144 for supporting the conventional abutment is also provided. You can also secure more.

Referring to FIG. 8B, an internal coupling groove 143-2 is formed discontinuously on the flange 140. The internal coupling groove 143-2 is formed adjacent to the lower side of the outer coupling protrusion 130 formed in a hexagonal column shape. In the present embodiment, the three internal coupling grooves 143-2 are formed at 120 degree intervals, respectively, but six internal coupling grooves may be formed at 60 degree intervals. The inner coupling groove 143-2 is formed discontinuously to easily define the direction in which the abutment is mounted.

In addition, as shown, the internal coupling groove 143-2 is an external coupling protrusion 130 so that the inner side of the internal coupling groove 143-2 coincides with the outer surface of the external coupling protrusion 130. Since it is located close to, the support surface 144 for supporting the abutment may be further secured. In particular, it is not easy to secure a space for providing the internal coupling groove 143-2 in the small size fixture, but as in the present embodiment, the internal coupling groove 143-2 is formed discontinuously. By forming adjacent to the outer engaging projection 130, it is possible to secure a wide space.

9 is a plan view and a sectional view illustrating another fixture according to another embodiment of the present invention.

Referring to FIG. 9, an internal coupling groove 142 is continuously formed on the flange 140, but the outer side surface of the external coupling protrusion 130 and the inner sidewall of the internal coupling groove 142 are coplanar. It is located in one plane. This may increase the space in which the internal coupling groove 142 may be formed around the external coupling protrusion 130, and as a result, the outer diameter of the coupling groove may be kept smaller than other internal coupling grooves 145. In addition, the support surface 144 on the upper surface of the flange 140 can be further secured.

Example 2

10 is an exploded front view for explaining a dental implant according to a second embodiment of the present invention.

Referring to FIG. 10, the implant 200 according to the second embodiment includes a fixture 210 and an abutment assembly, and the abutment assembly includes the intermediate abutment 250 and the upper abutment 270. ).

The fixture 210 includes a fixture body 220, a flange 240, an internal coupling groove 242, and an external coupling protrusion 230.

Fixture body 220 is composed of a titanium alloy, the outer surface is formed of tissue binding. The tissue binding portion may comprise a threaded or porous surface, and several recesses may be formed at the end of the fixture body 220.

A flange 240 is provided above the fixture body 220, and an external coupling protrusion 230 formed in a polygonal pillar shape is provided above the flange 240. Here, the flange 240 and the external coupling protrusion 230 are integrally formed with the fixture body 220 and are made of titanium alloy.

The external coupling protrusion 230 is for binding the abutment, and is formed in a polygonal pillar shape such as hexagon or octagon, and a screw hole is formed at a predetermined depth in the center portion. The external coupling protrusion 230 is for fixing the intermediate abutment 250 which is coupled by an external coupling method, according to the Branemark system.

A circular internal coupling groove 242 is formed on the flange 240 around the outer coupling protrusion 230. The internal coupling groove 242 is formed in a circular shape, and a support surface 244 having a predetermined width is formed between an end portion of the upper surface of the flange 240 and the internal coupling groove 242.

In addition, micro-convexities 249 are formed along side surfaces of the flange 240. Fine convexity 249 forms a plurality of concave-convex lines along the circumference of the flange 240, and can be easily adsorbed with the surrounding gum tissue, and can prevent the surrounding gum tissue from flowing down over time. .

As in the first embodiment, a margin 246 is provided around the flange 240. The margin part 246 is formed on the upper surface of the flange 240 of a predetermined size, thereby primarily preventing the bone tissue around the fixture 210 from sitting down, and secondly, the internal coupling groove 242 is formed. It can provide sufficient sidewalls that can be.

The intermediate abutment 250 is a screw retained or cement retained abutment, and an outer engaging groove 254 corresponding to the external engaging protrusion 230 of the fixture 210 is formed on the bottom thereof. An internal coupling protrusion 252 corresponding to the coupling groove 242 is formed along the periphery of the external coupling groove 254. The internal coupling protrusion 252 is formed in an annular shape corresponding to the internal coupling groove 242 and protrudes from the bottom of the abutment 250. In addition, a second screw hole 258 for passing the first screw 260 is formed in the center of the intermediate abutment 250.

An upper abutment 270 is disposed above the middle abutment 250, a crown is fixed to the upper abutment 270, and the upper abutment 270 is an intermediate abutment 250. It is anchored in to form an implant structure. The third screw hole 278 is formed at the center of the upper abutment 270, and the second screw 265 passes through the third screw hole 278 to be fastened to the head of the first screw 260. have. Of course, an external coupling structure and an internal coupling structure may also be applied between the intermediate abutment 250 and the upper abutment 270.

In addition, the sidewall of the internal coupling groove 242 is formed to provide an inclination with respect to the upper surface of the flange 240, so that the internal coupling protrusion 252 can be easily adhered to and separated from the internal coupling groove 242. have.

Example 3

11 is a perspective view of an impression coping according to a third embodiment of the present invention, and FIG. 12 is a perspective view of a lap analog according to the third embodiment.

The impression coping and lab analog shown in Figures 11 and 12 are for the fixture 110 and abutment 150 described in the previous embodiment, It is used in the process of manufacturing the prosthesis after placing in the alveolar bone.

In general, the impression coping is to specify the position and direction of the fixture implanted in the process of obtaining the impression, and refers to an article that is fixed to the fixture before the impression of the tooth is obtained using the impression material.

Referring to FIG. 11, the impression coping 300 according to the third embodiment includes a coping body 310 and a coping engagement unit 320. The coping body 310 is fixed on the fixture like the abutment, and like the abutment 150 of the previous embodiment, the external coupling groove 314 and the internal coupling protrusion 312 formed on the bottom of the body Include. The external coupling groove 314 corresponds to an external coupling protrusion of a fixture or a lap analog, and is formed in a polygonal pillar shape such as a hexagonal column, and accommodates the external coupling protrusion to prevent the rotation of the impression coping 300. do. In addition, an internal coupling protrusion 312 is formed around the external coupling groove 314. The internal coupling protrusion 312 corresponds to the internal coupling groove of the fixture to assist stable coupling between the fixture and the impression coping 300.

In addition, in order to maintain a stronger bond between the fixture and the impression coping 300, a second screw hole 326 corresponding to the screw hole of the fixture is formed in the impression coping 300, and the second screw hole 326. The coping screw 330 can be secured to the fixture or to the lap analog top.

The coping tie 320 includes an undercut 322 and an anti-rotation portion 324 is provided around the undercut 322. The undercut 322 is formed lower than the periphery. Therefore, after the impression of the tooth is obtained using the impression material, the axial movement of the impression coping 300 is limited by the undercut 322. In addition, the anti-rotation portion 324 is a surface that is partially cut in a planar shape around the undercut 322, the anti-rotation portion 324 prevents the rotation of the impression coping 300 inside the impression material.

Referring to FIG. 12, the lab analog 400 according to the third embodiment corresponds to the fixture 110 of the previous embodiment, and includes an external coupling protrusion 420 and a flange 430. An internal coupling groove 432 and a stone binding unit 410 is included.

The external coupling protrusion 420 is formed in a hexagonal column shape and includes a first screw hole 422 for binding the impression coping 300. The coping screw 330 is engaged with the first screw hole 422 through the second screw hole of the impression coping 320.

A flange 430 is provided at a lower end of the outer coupling protrusion 420. The flange 430 includes an internal coupling groove 432 formed along the periphery of the external coupling protrusion 420, and the in-tunnel coupling groove 432 includes an internal coupling protrusion 312 of the impression coping 300. Is inserted. A support surface 434 having a predetermined width is formed between an end of the upper surface of the flange 430 and the internal coupling groove 432 to support the bottom surface of the impression coping 300.

At the bottom of the flange 430 is provided a stone binding portion 410. The stone binding part 410 is for fixing the lab analog 400 to a stone for forming a tooth structure, and includes an undercut 412 and an anti-rotation part 414. As described in the impression coping 300, the undercut 412 is formed lower than the flange 430. Therefore, after the impression is taken, the lap analog 400 is bonded to the impression coping 300, and a stone is filled and cured on the lap analog 400 to reproduce the tooth structure of the patient. The lap analog 400 is fixed on the stone model by the undercut 412.

In addition, the anti-rotation portion 414 is a surface partially cut in a planar shape around the undercut 412, the anti-rotation portion 414 prevents the wrap analog 400 from rotating inside the stone model.

FIG. 13 is a partial cross-sectional view showing a state in which the impression coping and the lap analog are bound together according to the third embodiment.

Referring to FIG. 13, the lab analog 400 is coupled to the impression coping 300 before the stone model is formed, and the impression coping 300 and the lab analog 400 are mutually fixed by the coping screw 330. The external coupling groove 314 of the impression coping 300 receives the external coupling protrusion 422 of the lab analog 400, and the impression coping 300 is inserted into the internal coupling groove 432 of the lab analog 400. The internal coupling protrusion 312 is inserted and fixed stably.

In addition, according to another embodiment of the present invention, the engaging projection formed to the outside along the lower end of the internal coupling projection of the impression coping may be provided, correspondingly the internal engaging groove of the lab analog is a locking groove along the bottom of the inner side Can be formed. Therefore, when combining and disconnecting the impression coping and the lap analog from time to time, the protrusion and the locking groove can assist in the coupling between the impression coping and the lap analog, and make it possible to check the mutual coupling position, and easy coupling and disconnection It may be possible.

In order to easily bind and separate the internal coupling protrusion of the impression, the internal coupling protrusion may be partially cut and formed discontinuously, and the internal coupling protrusion may be inserted into or separated from the internal coupling groove. It is partially deformed and can pass easily.

According to the present invention, the fixture including the internal coupling groove can solve the problem of the external coupling method by selecting the advantages of the internal coupling method while using as the external coupling method as a basic. That is, by using the coupling between the internal coupling groove and the internal coupling protrusion may increase the contact area between the fixture and the abutment, it is possible to increase the length of the coupling. Thus, the fixture and the abutment can be stably combined.

In addition, since the external coupling protrusion of the fixture can use the same externally fixed fixture structure as the conventional Branemark system, 3i system, etc., it is fixed without problems with the conventional abutment without the internal coupling protrusion. You can.

In particular, when repairing by splinting several artificial teeth, a conventional Branemark or 3i abutment may be used. Of course, by using fixtures and abutments made in accordance with the present invention, even when restoring two or more teeth, a single crown can be produced, respectively, and optimal effects can be obtained without splinting.

In particular, even when there is no abutment with internal engaging projection, the abutment that is most frequently used can be applied. Therefore, it is not necessary to obtain the optimum parts suitable for the fixture such as overseas business trip or overseas travel. Conventional abutments can be used safely. For reference, since most fixtures and abutments are manufactured in a different way from each other, in many cases, the procedure itself is impossible when the parts are difficult to purchase.

In addition, such a structure has the advantage of being economical because a conventional tool or kit can be used even during the impression coping or other implant procedures.

The practitioner can apply both the advantages of the external coupling type and the internal coupling type by using the abutment manufactured corresponding to the fixture, and can obtain the optimal effect intended by the operator.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that it can be changed.

Claims (29)

An outer coupling protrusion formed in a polygonal column shape and having a first screw hole having a predetermined depth at a center thereof for binding the abutment; A flange provided at a lower end of the outer coupling protrusion; And The flange includes an internal coupling groove formed along the periphery of the external coupling protrusion, and has a predetermined width between the end of the upper surface of the flange and the internal coupling groove to support the bottom of the abutment. Cotton is formed, And a fixture body provided integrally with the lower end of the flange and having a tissue binding portion formed on an outer surface thereof. The method of claim 1, The flange further comprises a margin formed around the flange, wherein the margin and the upper surface of the flange is a dental implant fixture, characterized in that connected by the inclined surface facing outward. The method of claim 1, For easy insertion and removal of the abutment, at least one inner side of the internal coupling groove is a dental implant fixture, characterized in that formed inclined or vertically facing upwards. The method of claim 1, The internal coupling groove is a dental implant fixture, characterized in that formed continuously or discontinuously on the flange. The method of claim 1, The inner side of the inner coupling groove located in the inner side of the inner coupling groove is connected to the outer surface of the external coupling projections for a dental implant, characterized in that to provide one surface. The method of claim 1, The internal coupling groove is formed discontinuously on the flange, each of the internal coupling groove is a dental implant fixture, characterized in that provided adjacent to the lower side of the outer engaging projection. The method of claim 1, The external coupling projection is a fixture for a dental implant, characterized in that formed in the size corresponding to the coupling groove of the existing external coupling abutment can be compatible. The method of claim 1, The tissue binding part is a dental implant fixture, characterized in that it comprises a thread formed on the outer surface of the fixture. The method of claim 1, And the tissue binding portion comprises a porous surface for increasing the contact area between bone tissue and the fixture body. The method of claim 1, Dental implant fixture, characterized in that a plurality of fine grooves are formed along the side of the flange. Is formed in a polygonal column shape, the first screw hole for binding the abutment is formed in the center of the outer engaging projection, a flange provided at the lower end of the outer engaging projection, and provided at the lower end of the flange It is formed integrally, the tissue binding portion includes a fixture body formed on the outer surface, the flange includes an internal coupling groove formed along the periphery of the outer engaging projection, and to support the bottom of the abutment A fixture having a support surface having a predetermined width between an end portion of an upper surface of the flange and the internal coupling groove; And An external coupling groove corresponding to the external coupling protrusion, an internal coupling protrusion corresponding to the internal defect groove, and a second screw hole corresponding to the first screw hole; An abutment assembly formed at a bottom of the internal coupling protrusion and fixed to the fixture by the external coupling groove and the internal coupling protrusion; Dental implant having a. The method of claim 11, The flange further includes a margin formed around the flange, wherein the margin and the upper surface of the flange is a dental implant, characterized in that connected by the inclined surface facing outward. The method of claim 11, In order to facilitate insertion and removal of the abutment, at least one inner side surface of the internal coupling groove is formed to be inclined or vertically upward, and the internal coupling protrusion also corresponds to the internal coupling groove. Dental implant, characterized in that formed inclined or vertical. The method of claim 11, And the internal coupling groove is formed continuously or discontinuously on the flange. The method of claim 14, The internal coupling protrusion is a dental implant, characterized in that formed continuously or discontinuously corresponding to the internal coupling protrusion formed continuously or discontinuously. The method of claim 11, The inner side of the inner side of the inner coupling groove in the inner coupling groove is connected to the outer surface of the external coupling protrusion dental implant, characterized in that to provide one surface. The method of claim 11, The internal coupling groove is formed discontinuously on the flange, each of the internal coupling groove dental implant, characterized in that provided adjacent to the lower side of the outer engaging projection. The method of claim 11, The abutment assembly is integrally formed and includes an upper support surface for supporting a crown, and the second screw hole penetrates through the center of the abutment assembly and is formed in the center of the external coupling groove. Dental implants. The method of claim 11, The abutment assembly includes an abutment and an intermediate abutment, the abutment includes an upper support surface for supporting a crown, and the outer coupling groove and the bottom surface of the intermediate abutment An internal coupling protrusion is formed, wherein the second screw hole is formed in the center of the external coupling groove through the center of the abutment and the intermediate abutment. An outer coupling protrusion formed in a polygonal pillar shape and having a first screw hole having a predetermined depth at a center thereof to bind the impression coping; A flange provided at a lower end of the outer coupling protrusion; And The flange includes an internal coupling groove formed along the periphery of the external coupling protrusion, and a support surface having a predetermined width between an end portion of the upper surface of the flange and the internal coupling groove to support a bottom of the impression coping. Is formed, And an analog body provided integrally with the lower end of the flange and having a stone binding portion formed on an outer surface thereof. The method of claim 20, And the internal coupling groove is formed continuously or discontinuously on the flange. The method of claim 20, Lap analog characterized in that the inner side of the inner side of the inner coupling groove located in the inner coupling groove is connected to the outer surface of the external coupling projection to provide a single surface. The method of claim 20, And the stone engagement portion includes an undercut to secure the lap analog to a stone to be solidified. The method of claim 20, Lab stone, characterized in that for the anti-rotation of the lap analog the stone binding portion comprises an anti-rotation. The method of claim 20, Lab analog, characterized in that the lower end of the inner side located on the outer side of the inner coupling groove in the internal coupling groove formed along the bottom of the internal coupling groove. In impression coping corresponding to a fixture or lab analog for a dental implant, A coping body engaged with the fixture; And And a coping engagement portion formed on the coping body and including an undercut for fixing the coping body to the impression material. The coping body includes an external coupling groove formed in a polygonal pillar shape corresponding to the external coupling protrusion of the fixture and an internal coupling protrusion formed around the inlet of the external coupling groove, and corresponds to the screw hole of the fixture. And a second screw hole is formed in the coping body. The method of claim 26, Impression coping characterized in that the internal coupling protrusion is formed continuously or discontinuously. The method of claim 26, And the coping tie portion comprises an anti-rotation portion for anti-rotation of the impression coping. The method of claim 26, The internal coupling protrusion is partially cut is formed discontinuously, the impression coping, characterized in that the engaging projection is formed along the lower end of the internal coupling projection to the outside of the bottom of the internal coupling projection.

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