CN111568610B - Lateral front approach cervical interbody fusion cage and matched bone grafting tool - Google Patents
Lateral front approach cervical interbody fusion cage and matched bone grafting tool Download PDFInfo
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 175
- 230000004927 fusion Effects 0.000 title abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 42
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 230000000903 blocking effect Effects 0.000 claims description 17
- 230000006978 adaptation Effects 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000002513 implantation Methods 0.000 abstract description 8
- 239000012634 fragment Substances 0.000 description 30
- 239000007943 implant Substances 0.000 description 4
- 208000019505 Deglutition disease Diseases 0.000 description 3
- 210000003238 esophagus Anatomy 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 210000003437 trachea Anatomy 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 210000004446 longitudinal ligament Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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- 210000003041 ligament Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4601—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Biomedical Technology (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
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Abstract
The invention relates to a lateral front approach cervical interbody fusion cage and a matched bone grafting tool, belonging to the technical field of medical instruments. The cage can be used for implantation from the lateral anterior of the cervical spine. The bone grafting tool comprises an injection tube, a taper tube and a piston, the injection tube is connected with the taper tube, a catching groove is formed in the outer wall of the injection tube, the injection tube is inserted into a bone grafting window during use, and a bone grafting material is pushed into a bone grafting cavity through the piston, so that the operation of filling the bone grafting material by the fusion cage is simpler and more convenient.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a lateral anterior approach cervical interbody fusion cage and a matched bone grafting tool.
Background
Anterior cervical decompression fusion has been the classic and effective surgical method for treating degenerative diseases of cervical vertebrae, during which the trachea and esophagus are pulled and the fibrous ring and the anterior longitudinal ligament at the corresponding part are cut off, so that the surgery will destroy the segment stability of the vertebrae and present the risk of complications such as dysphagia after operation. In order to solve the technical problem, researchers propose a scheme of implanting the fusion cage from the lateral front of the cervical vertebra, when the lateral front approach fusion is carried out, a lateral front micro opening of an intervertebral space is formed, so that the trachea and the esophagus do not need to be pulled, the original fiber ring and the anterior longitudinal ligament in front of a patient can be reserved, and the instability of the operation and the probability of dysphagia of the patient caused by the operation are greatly reduced.
The cervical vertebra side front operation approach has smaller operation visual field, smaller operation channel and smaller space for fixing and implanting operation, and the bone surface for fixing in the side front is also different from the approach in the front. However, the fusion cage in the prior art is designed for anterior cervical decompression fusion, and the size and the fixing manner of the fusion cage are not suitable for the anterior cervical approach, so that a fusion cage suitable for the anterior cervical approach is urgently needed.
Disclosure of Invention
The invention provides a lateral anterior approach cervical interbody fusion cage, which is used for solving the technical problem that the fusion cage in the prior art cannot be suitable for the lateral anterior approach of cervical vertebra.
The invention is realized by the following technical scheme: a lateral anterior approach cervical interbody cage, comprising:
the bone grafting device comprises a bone grafting cavity, a first supporting block and a second supporting block, wherein the first supporting block is used for supporting the left part of an intervertebral space, the second supporting block is used for supporting the right part of the intervertebral space, the bone grafting cavity is arranged between the first supporting block and the second supporting block, a bone grafting window for filling bone grafting materials is arranged on the second supporting block, the bone grafting window is communicated with the bone grafting cavity, and through holes are formed in the upper, lower, front and rear side walls of the bone grafting cavity;
an expansion structure expanding towards the front and back direction is further arranged outside the bone grafting cavity, and when bone grafting materials are filled in the bone grafting cavity, the bone grafting materials penetrate through the through holes and press the expansion structure to expand outwards;
still include occlusive member, occlusive member demountable fixation installs in bone grafting window department will the bone grafting window is stopped up, be equipped with the fixed knot who is used for fixing on the occlusive member constructs.
Furthermore, in order to better realize the invention, the expansion structure comprises a first elastic sheet and a second elastic sheet, one end of the first elastic sheet and one end of the second elastic sheet are both connected to the first supporting block, the other end of the first elastic sheet and the other end of the second elastic sheet are both slidably mounted on the second supporting block, the first elastic sheet covers the through hole on the front side wall of the bone implantation cavity, and the second elastic sheet covers the through hole on the rear side wall of the bone implantation cavity.
Furthermore, in order to better realize the invention, an elastic buckle is arranged on the inner wall of the bone grafting window, a catching groove matched with the elastic buckle is arranged on the blocking component, the elastic buckle is buckled in the catching groove, the blocking component comprises a first plate, a second plate and a connecting rod, the connecting rod is connected between the first plate and the second plate and forms an I-shaped structure, and the catching groove is formed among the first plate, the second plate and the connecting rod.
Further, in order to better implement the present invention, the fixing structure includes a first guiding hole, a second guiding hole, a first locking component and a second locking component, the first guiding hole and the second guiding hole are both disposed on the second plate, the first locking component is threaded in the first guiding hole and detachably and fixedly connected to a vertebra above the intervertebral space, and the second locking component is threaded in the second guiding hole and detachably and fixedly connected to a vertebra below the intervertebral space.
Further, in order to better implement the present invention, the first locking member and the second locking member are both screws.
Further, in order to better implement the present invention, sliding grooves are respectively formed on the front side wall and the rear side wall of the second support block, sliding blocks are respectively arranged at the other end of the first elastic sheet and the other end of the second elastic sheet, the sliding block on the first elastic sheet is slidably mounted in the sliding groove on the front side wall of the second support block, and the sliding block on the second elastic sheet is mounted in the sliding groove on the rear side wall of the second support block.
Furthermore, in order to better implement the present invention, a plurality of through pores are respectively disposed on the first elastic sheet and the second elastic sheet.
Further, in order to better realize the invention, the top wall of the bone grafting cavity and the bottom wall of the bone grafting cavity are both convex arc structures, and the upper surface of the top wall of the bone grafting cavity and the lower surface of the bottom wall of the bone grafting cavity are both provided with a plurality of convex parts for preventing slipping.
The invention also provides a bone grafting tool, which is used for medical staff to more conveniently inject bone grafting materials into the bone grafting window and the bone grafting cavity of the lateral anterior approach cervical interbody fusion cage.
This bone grafting instrument includes syringe, taper pipe, piston and above-mentioned side the place ahead approach cervical interbody fusion cage, the syringe with the taper pipe is connected and is constituteed the funnel structure, the syringe is kept away from be equipped with on the one end outer wall of taper pipe with the draw-in groove of elasticity buckle adaptation, be equipped with the push rod on the piston just the piston with the syringe adaptation.
Further, in order to better implement the invention, the injection device further comprises a grab handle which is connected to the end face of the taper pipe, which is far away from the injection pipe.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a lateral front approach cervical interbody fusion cage, which comprises a bone grafting cavity, a first supporting block, a second supporting block, a first elastic sheet, a second elastic sheet and a blocking component, wherein the bone grafting cavity is arranged between the first supporting block and the second supporting block, the first supporting block and the second supporting block are respectively used for supporting the left part and the right part of a vertebral clearance, the bone grafting cavity can be supported in the middle of the vertebral clearance, through holes are respectively arranged on the upper side wall, the lower side wall, the front side wall, the rear side wall and the front side wall of the bone grafting cavity, a bone grafting window is arranged on the second supporting block and communicated with the bone grafting cavity, the first elastic sheet and the second elastic sheet are both connected on the first supporting block, one ends of the first elastic sheet and the second elastic sheet, which are far away from the first supporting block, are both connected on the second supporting block in a sliding manner, and are respectively covered outside the through holes on the front side wall and the rear side wall of the bone grafting cavity, with this side place ahead approach cervical vertebra spare fusion cage from cervical vertebra side place ahead approach implantation patient's intervertebral space, and make first supporting shoe, bone grafting chamber and second supporting shoe get into intervertebral space in proper order, at this moment, because there is not the object extrusion first shell fragment and second shell fragment in the bone grafting chamber, so first shell fragment and second shell fragment are all attached on bone grafting chamber outer wall this moment, compact size, so as to implant from cervical vertebra side the place ahead, after the implantation, medical personnel pour into the bone grafting chamber with bone grafting material into from bone grafting window, increase along with the quantity of bone grafting material in the bone grafting chamber, bone grafting material will be extruded from through-hole explant bone chamber on the bone grafting chamber lateral wall, bone grafting material that lateral wall through-hole came out before the bone grafting chamber will extrude first shell fragment, bone grafting material that lateral wall through-hole came out behind the bone grafting chamber will extrude the second shell fragment, first shell fragment and second shell fragment then can produce elastic deformation and expand outwards and between first shell fragment and bone grafting chamber and second shell fragment and the expansion The intervertebral fusion cage comprises a bone grafting cavity, a plurality of bone grafting windows and a blocking component, wherein the bone grafting cavity is provided with a plurality of bone grafting windows, the bone grafting windows are respectively provided with a plurality of vertically-through fan-shaped areas, and the fan-shaped areas are filled with bone grafting materials so as to enlarge the bone grafting area and enable the bone grafting materials in the fan-shaped areas to grow better;
2. the invention provides a bone grafting tool matched with the lateral anterior approach cervical interbody fusion cage, which comprises an injection tube, a conical tube and a piston, wherein the injection tube is connected with the conical tube to form a funnel structure, a clamping groove is formed in the injection tube, the piston is matched with the injection tube, and a push rod is arranged on the piston.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view illustrating a bone grafting material is injected into a bone grafting cavity by using a bone grafting tool according to an embodiment of the present invention;
FIG. 2 is a schematic view of a lateral anterior approach cervical interbody cage in an embodiment of the present invention, shown fully filled with bone graft material;
fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A in fig. 2.
In the figure:
1-bone grafting cavity; 2-a first support block; 3-a second support block; 31-bone window implant; 4-a first elastic sheet; 5-a second elastic sheet; 6-a blocking member; 61-catching grooves; 7-a grab handle; 8, an elastic buckle; 9-a first locking member; 10-a second locking member; 11-a slide block; 12-pores; 13-a convex part; 14-a syringe; 141-card slot; 15-a conical tube; 16-a piston; 17-push rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1:
the present embodiment provides a lateral anterior approach interbody cage that can be implanted into an intervertebral space for bone grafting from the lateral anterior of the cervical spine.
This side place ahead approach cervical interbody fusion cage is including planting bone cavity 1, first supporting shoe 2 and second supporting shoe 3, the aforesaid is planted bone cavity 1 and is connected between first supporting shoe 2 and second supporting shoe 3, during the use, implant intervertebral space from cervical vertebra side the place ahead with whole fusion cage, and make first supporting shoe 2, plant bone cavity 1 and second supporting shoe 3 and get into intervertebral space in proper order, first supporting shoe 2 supports in intervertebral space left part, second supporting shoe 3 supports in intervertebral space right part, it supports in the middle part in intervertebral space to plant bone cavity 1. Above-mentioned second supporting shoe 3 is equipped with bone grafting window 31, and this bone grafting window 31 switches on with above-mentioned bone grafting chamber 1 to in the bone grafting material is filled in towards bone grafting chamber 1 through this bone grafting window 31, all be equipped with the through-hole on four lateral walls around bone grafting chamber 1 about, when the bone grafting material quantity in bone grafting chamber 1 reaches the certain degree after, the bone grafting material will be extruded from the through-hole.
Still be equipped with the expanding structure outside bone grafting cavity 1, this expanding structure can be to the expansion of back and forth direction, when filling or being filled up with bone grafting material in bone grafting cavity 1, bone grafting material passes above-mentioned through-hole on 1 preceding lateral wall of bone grafting cavity and the back lateral wall and extrudes this expanding structure to make this expanding structure expand outwards, at this moment, this expanding structure the inside can be full of bone grafting material. As a best mode of the present embodiment, the expanding structure in the present embodiment includes a first elastic sheet 4 and a second elastic sheet 5.
The first elastic sheet 4 is connected to the front side wall of the first supporting block 2, and the second elastic sheet 5 is connected to the rear side wall of the first supporting block 2, and it is worth noting that the first elastic sheet 4 and the second elastic sheet 5 are both of elastic sheet structures, and the first elastic sheet 4 and the second elastic sheet 5 can both generate elastic bending when receiving extrusion acting force. The other end of first shell fragment 4 and the other end of second shell fragment 5 are all slidable mounting on second supporting shoe 3, and outside the through-hole on the wall of bone grafting chamber 1 front side first shell fragment 4 covers, outside the through-hole on the wall of bone grafting chamber 1 rear side second shell fragment 5 covers, then can extrude first shell fragment 4 outwards when bone grafting material in bone grafting chamber 1 extrudes from the through-hole on its wall of front side, first shell fragment 4 will produce and buckle and expand outwards, bone grafting material that extrudes from bone grafting chamber 1 rear side wall will extrude second shell fragment 5, make second shell fragment 5 buckle and expand outwards, at this moment, just can respectively form a fan-shaped region between first shell fragment 4 and bone grafting chamber 1 and between second shell fragment 5 and bone grafting chamber 1, and also will fill with bone grafting material in the fan-shaped region, fan-shaped region's upper and lower both sides all link up, wherein bone grafting material can grow, and two fan-shaped regions correspond front end and rear end in the middle part of vertebra clearance respectively. According to research, the bone grafting material at the front end and the rear end in the middle of the intervertebral space has better growth effect, so that by adopting the structure, the bone grafting material is respectively placed at the front end and the rear end in the middle of the intervertebral space through a fan-shaped area so as to obtain better bone grafting growth effect.
The bone grafting device further comprises a blocking component 6, when the bone grafting cavity 1 and the sector area are filled with bone grafting materials, the blocking component 6 is arranged at the position of the bone grafting window 31, at this time, the blocking component 6 can block the bone grafting window 31 so as to prevent the bone grafting materials in the bone grafting cavity 1 from reversely falling out and coming out of the bone grafting window 31. The closing part 6 is also provided with a fixing structure by means of which the entire lateral anterior approach cervical cage can be fixed to the side wall of the intervertebral space.
Adopt above-mentioned structure, the side the place ahead way of going into the interbody fusion cage that this embodiment provided is when not filling the bone grafting material, first shell fragment 4 and second shell fragment 5 paste respectively on the lateral wall around the bone grafting chamber 1, make overall structure compacter and smaller, so that implant the intervertebral space from the way of going into of cervical vertebra side the place ahead, after filling in the bone grafting material, first shell fragment 4 and second shell fragment 5 expand outwards, in order to form required bone grafting holding chamber, and then plant the bone between the intervertebral space. In addition, the fixing structure of the lateral anterior approach cervical interbody fusion cage is provided on the blocking member 6, and the blocking member 6 is installed at the bone grafting window 31 so as to be operated laterally anterior to the cervical vertebrae. Therefore, the lateral front approach cervical interbody fusion cage provided by the embodiment can be suitable for being implanted from the lateral front of the cervical vertebra, does not need to pull the trachea and the esophagus in the operation process, does not damage the original fibrous membrane and the ligament of the patient, reduces the probability of dysphagia generated by wiping the patient, increases the stability of the postoperative stage, promotes early rehabilitation training, and helps the patient to return to the working position as soon as possible.
Example 2:
in this embodiment, as a specific implementation manner of the above embodiment, in this embodiment, an elastic buckle 8 is disposed on an inner wall of the bone grafting window 31, a buckle groove 61 is disposed on the blocking member 6, and when the blocking member 6 is blocked at the bone grafting window 31, the elastic buckle 8 is buckled in the buckle groove 61. This construction is simple and convenient to install and, by virtue of the connection between the elastic catch 8 and the catch groove 61, it is possible to stably block the blocking member 6 in the above-mentioned bone grafting window 31.
As a preferred embodiment of the present invention, the blocking member 6 of the present embodiment comprises a first plate, a second plate and a connecting rod, wherein the connecting rod is connected between the first plate and the second plate, the first plate, the second plate and the connecting rod form an i-shaped structure, and the fastening groove 61 is formed between the first plate and the connecting rod as well as between the first plate and the second plate. The blocking component with the structure is simple to manufacture and convenient to use.
It should be noted that the first plate is adapted to the opening of the bone window 31, and when in use, the first plate is inserted into the bone window 31 and passes through the elastic buckle 8, such that the elastic buckle 8 is placed in the buckle slot 61 between the first plate and the second plate for buckling, and the second plate is located outside the bone window 31. The first plate blocks the bone grafting window 31.
Example 3:
this embodiment is a best mode of embodiment 2, and the fixing structure in this embodiment comprises a first guiding hole, a second guiding hole, a first locking component 9 and a second locking component 10, wherein the first guiding hole and the second guiding hole are both arranged on the second plate, the first locking component 9 is threaded in the first guiding hole and is detachably and fixedly connected to a vertebra above the intervertebral space, and the second locking component 10 is threaded in the second guiding hole and is detachably and fixedly connected to a vertebra below the intervertebral space. As a best mode of the present embodiment, the first locking member 9 and the second locking member 10 of the present embodiment are both screws.
By adopting the structure, the screw is installed from the second plate to the side wall of the intervertebral space, so that the operation is simpler and more convenient, and the operation is convenient to be carried out from the front side of the cervical vertebra.
Example 4:
in this embodiment, as a best implementation manner of the above embodiment, in this embodiment, a sliding groove is disposed on each of the front side wall and the rear side wall of the second supporting block 3, and a sliding block 11 is disposed on each of the first elastic sheet 4 and the second elastic sheet 5, when the device is installed, the sliding block 11 on the first elastic sheet 4 is slidably installed in the sliding groove on the front side wall of the second supporting block 3, and the sliding block 11 on the second elastic sheet 5 is slidably installed in the sliding groove on the rear side wall of the second supporting block 3. Like this, when first shell fragment 4 and second shell fragment 5 receive the extrusion of bone grafting material and produce elastic deformation and outwards expand, first shell fragment 4 and second shell fragment 5 all can produce on second supporting shoe 3 and slide to make the area that fan-shaped region between first shell fragment 4 and the bone grafting chamber 1 and the fan-shaped region between second shell fragment 5 and the bone grafting chamber 1 can cover wider.
Example 5:
in this embodiment, as a more preferable embodiment of the above embodiment, in the present embodiment, a plurality of through pores 12 are provided on both the first spring plate 4 and the second spring plate 5, so that the nutrient substance in the intervertebral space can pass through the pores 12 and enter the fan-shaped region, and thus the nutrient substance can more smoothly reach the bone grafting material in the fan-shaped region, thereby nourishing the growth of the bone grafting material therein.
In a preferred embodiment, the top wall and the bottom wall of the bone grafting cavity 1 are convex arc structures to fit with the side wall of the intervertebral space, i.e. the edge shape of the end plate, so as to form a more stable support in the intervertebral space. Moreover, a plurality of convex parts 13 are arranged on the upper surface of the top wall of the bone implantation cavity 1 and the lower surface of the bottom wall of the bone implantation cavity 1, when the convex parts 13 are contacted with the side wall of the intervertebral space, the friction force can be increased, and further the lateral anterior approach cervical interbody fusion cage provided by the embodiment is more stably installed in the intervertebral space.
Example 6:
the present embodiment provides a bone implantation tool, which is used with the lateral anterior approach cervical interbody fusion cage provided in the above embodiments. The bone grafting tool comprises an injection tube 14, a taper tube 15 and a piston 16, wherein the injection tube 14 is connected with the taper tube 15 and forms a funnel structure, a clamping groove 141 is arranged on the outer wall of one end, far away from the taper tube 15, of the injection tube 14, the clamping groove 141 is matched with an elastic buckle 8 at the position of the bone grafting window 31, during installation, the injection tube 14 is inserted into the bone grafting window 31, and the elastic buckle 8 is buckled in the clamping groove 141, so that the bone grafting tool and the lateral front approach neck interbody fusion cage are connected to form a whole, a user holds the bone grafting tool, the position of the whole lateral front approach neck interbody fusion cage is fixed, then the bone grafting material is injected into the taper tube 15, the bone grafting material can be accumulated at the position of the bone grafting tool by means of the taper tube 15, then the bone grafting material is pushed into the bone grafting window 31 and the bone grafting cavity 1 by the piston 16, and a push rod 17 is arranged on the piston 16, so that medical personnel can push the bone grafting personnel.
The bone grafting tool with the structure can simplify the operation of injecting bone grafting materials into the lateral anterior approach cervical interbody fusion cage.
It is worth noting that the medical staff uses forceps to place the bone grafting material into the funnel structure.
In a more preferred embodiment of the present embodiment, a grip 7 is provided on an end surface of the taper pipe 15 away from the injection pipe 14. When in use, the medical staff can hold the handle 7 by hand to hold the whole bone grafting tool, thereby further enhancing the convenience of operation.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A lateral anterior approach cervical interbody cage, comprising:
the bone grafting device comprises a bone grafting cavity, a first supporting block and a second supporting block, wherein the first supporting block is used for supporting the left part of an intervertebral space, the second supporting block is used for supporting the right part of the intervertebral space, the bone grafting cavity is arranged between the first supporting block and the second supporting block, a bone grafting window for filling bone grafting materials is arranged on the second supporting block, the bone grafting window is communicated with the bone grafting cavity, and through holes are formed in the upper, lower, front and rear side walls of the bone grafting cavity;
an expansion structure expanding towards the front and back direction is further arranged outside the bone grafting cavity, and when bone grafting materials are filled in the bone grafting cavity, the bone grafting materials penetrate through the through holes and press the expansion structure to expand outwards;
the blocking component is detachably and fixedly arranged at the bone grafting window to block the bone grafting window, and a fixing structure for fixing is arranged on the blocking component;
the expansion structure comprises a first elastic sheet and a second elastic sheet, one end of the first elastic sheet and one end of the second elastic sheet are connected to the first supporting block, the other end of the first elastic sheet and the other end of the second elastic sheet are slidably mounted on the second supporting block, the first elastic sheet covers the through hole in the front side wall of the bone planting cavity, and the second elastic sheet covers the through hole in the rear side wall of the bone planting cavity.
2. A lateral anterior approach cervical interbody cage according to claim 1, wherein: be equipped with elastic buckle on the bone grafting window inner wall, be equipped with on the block member with the catching groove of elastic buckle adaptation, elastic buckle lock joint in the catching groove, the block member includes first board, second board and connecting rod, the connecting rod is connected the first board with between the second board and constitute the I shape structure, the first board the second board and form between the connecting rod the catching groove.
3. A lateral anterior approach cervical interbody cage according to claim 2, wherein: the fixing structure comprises a first guide hole, a second guide hole, a first locking component and a second locking component, wherein the first guide hole and the second guide hole are formed in the second plate, the first locking component penetrates into the first guide hole and is detachably and fixedly connected to one vertebra above the intervertebral space, and the second locking component penetrates into the second guide hole and is detachably and fixedly connected to one vertebra below the intervertebral space.
4. A lateral anterior approach cervical interbody cage as claimed in claim 3, wherein: the first and second locking members are each a screw.
5. A lateral anterior approach cervical interbody cage according to claim 3, wherein: the front side wall and the rear side wall of the second supporting block are both provided with sliding grooves, the other end of the first elastic sheet and the other end of the second elastic sheet are both provided with sliding blocks, the sliding blocks on the first elastic sheet are slidably mounted in the sliding grooves in the front side wall of the second supporting block, and the sliding blocks on the second elastic sheet are mounted in the sliding grooves in the rear side wall of the second supporting block.
6. A lateral anterior approach cervical interbody cage as claimed in claim 2, wherein: the first elastic sheet and the second elastic sheet are both provided with a plurality of through pores.
7. A lateral anterior approach cervical interbody cage as claimed in claim 2, characterized in that: the top wall of the bone grafting cavity and the bottom wall of the bone grafting cavity are both of convex arc structures, and the upper surface of the top wall of the bone grafting cavity and the lower surface of the bottom wall of the bone grafting cavity are both provided with a plurality of convex parts used for skid resistance.
8. A bone grafting tool for use with the lateral anterior approach cervical interbody cage of any one of claims 2-7, wherein: including injection syringe, taper pipe and piston, the injection syringe with the funnel structure is connected and constituteed to the taper pipe, the injection syringe is kept away from be equipped with on the one end outer wall of taper pipe with the draw-in groove of elasticity buckle adaptation, be equipped with the push rod on the piston just the piston with the injection syringe adaptation.
9. A bone grafting tool as claimed in claim 8, wherein: the injection device also comprises a grab handle which is connected to the end face of one end of the taper pipe far away from the injection pipe.
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| CN202010478506.9A CN111568610B (en) | 2020-05-29 | 2020-05-29 | Lateral front approach cervical interbody fusion cage and matched bone grafting tool |
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| CN111839835B (en) * | 2020-08-31 | 2022-04-12 | 四川大学华西医院 | Intervertebral fusion fixer for lateral anterior approach vertebral body reconstruction |
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