CN111631844B - Double-skin elastic fixation fusion cage - Google Patents
Double-skin elastic fixation fusion cage Download PDFInfo
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- CN111631844B CN111631844B CN202010479869.4A CN202010479869A CN111631844B CN 111631844 B CN111631844 B CN 111631844B CN 202010479869 A CN202010479869 A CN 202010479869A CN 111631844 B CN111631844 B CN 111631844B
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- side plate
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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
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7061—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant for stabilising vertebrae or discs by improving the condition of their tissues, e.g. using implanted medication or fluid exchange
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7094—Solid vertebral fillers; devices for inserting such fillers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
Abstract
The invention relates to a double-cortical elastic fixation fusion cage, which belongs to the technical field of medical instruments and comprises a bone grafting supporting part and an elastic supporting fixing part for supporting in the front part of a vertebral gap, wherein a bone grafting cavity is arranged on the bone grafting supporting part, the elastic supporting fixing part and the bone grafting supporting part are connected together, and a fixing structure which is sequentially fixed on cortical bone, cancellous bone and lateral cortical bone of a vertebral end plate in a penetrating way is arranged on the elastic supporting fixing part. Adopt this structure, the elastic support fixed part can produce micro-elastic deformation, low head at the patient, the in-process of raising the head or turning round the head, the elastic support fixed part can reduce stress concentration and stress through elastic deformation and shelter from, thereby it is not hard up to reduce postoperative fixed knot structure, withdraw from, the probability that phenomena such as bone absorption take place, fixed knot constructs in proper order the cross-under and fixes at vertebra end plate cortex of bone, cancellous bone and side cortex of bone, play better fixed effect, thereby be favorable to bone grafting material to grow in the intervertebral space.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a double-skin elastic fixation fusion cage.
Background
The human vertebral body bone is composed of outer cortical bone and inner cancellous bone, the cancellous bone is spongy and formed by arranging bone trabeculae which are mutually interwoven and distributed in the vertebral body, and the surface of the vertebral body and the end plates are composed of hard cortical bone with higher strength. Literature research reports that the bone density is one of important factors influencing the screw fixation strength, and when the screw parameters are consistent, the screw fixation strength is increased along with the increase of the bone density of the vertebral body; the strength and density of the cortical bone are higher than those of the cancellous bone, so that the fixing technology of the cortical bone screw can increase the fixing strength of the screw and reduce the risk of screw withdrawal.
In the current cervical spine surgery technology, in order to enhance the screw fixing strength, the following 2 screw fixing technologies can be adopted: firstly, the anterior cervical spine reverse pedicle screw is fixed (the bone cortex at the pedicle is thicker), and secondly, the screw penetrates through the back wall of the vertebral body from the front cortex of the vertebral body backwards so as to achieve double-cortical fixation. But there are a great deal of inconveniences when the fusion cage that produces based on above-mentioned technique uses, and the screw passes the end plate behind the miniature titanium plate screw hole in the place ahead and gets into in the centrum cancellous bone, and fixed strength is limited to the place ahead titanium plate is a whole, and elastic modulus is great, and stress shielding and stress concentration phenomenon are all comparatively obvious, and the phenomenon incidence risk such as postoperative screw is become flexible, withdraw from, bone absorption is higher.
Disclosure of Invention
The invention provides a double-skin elastic fixation fusion cage, which is used for solving the technical problems of various inconveniences existing in the use process of the fusion cage in the prior art.
The invention is realized by the following technical scheme: the utility model provides a two skin elastic fixation fuse ware, includes the bone grafting supporting part and is used for supporting the elastic support fixed part in intervertebral space front portion, be equipped with the bone grafting chamber that is used for filling the bone grafting material on the bone grafting supporting part, the elastic support fixed part with the bone grafting supporting part links together, install the fixed knot who fixes at vertebra end plate cortex lycii, cancellous bone and side cortex lycii in proper order cross-under on the elastic support fixed part and construct.
Furthermore, in order to better realize the invention, the elastic support fixing part comprises a flexible filler and a hollow shell formed by splicing a front side plate, a rear side plate, an upper side plate, a lower side plate, a left side plate and a right side plate, wherein the flexible filler is filled in the hollow shell, the thicknesses of the upper side plate and the lower side plate are all A, the thicknesses of the front side plate, the rear side plate, the left side plate and the right side plate are all B, and A is larger than B.
Further, in order to better realize the invention, the front side plate, the rear side plate, the left side plate, the right side plate, the upper side plate and the lower side plate are all titanium plates, the thicknesses of the upper side plate and the lower side plate are all 1mm, the thicknesses of the front side plate, the rear side plate, the left side plate and the right side plate are all B, and B is more than or equal to 0.3mm and less than or equal to 0.5mm.
Further, in order to further realize the present invention, the flexible filler is a spring, and both ends of the spring are respectively abutted against the upper side plate and the lower side plate.
Further, in order to better implement the present invention, the flexible filler is a spring plate, and two ends of the spring plate are respectively abutted against the upper side plate and the lower side plate.
Furthermore, in order to better realize the invention, a plurality of through pores are arranged on the wall of the bone grafting cavity.
Further, in order to better implement the present invention, the upper surface of the upper side plate and/or the lower surface of the lower side plate and/or the upper and lower surfaces of the bone grafting support part are provided with protrusions for preventing slipping.
Further, in order to better implement the present invention, the fixing structure includes a first hole, a first locking portion, a second hole, and a second locking portion, the first hole faces upward and rearward and is inclined to the side, the first hole penetrates the anterior side plate and the superior side plate, the second hole faces downward and is inclined to the side, the second hole penetrates the anterior side plate and the inferior side plate, the first locking portion is connected to the first hole, the first locking portion sequentially penetrates cortical bone, cancellous bone, and lateral cortical bone of a vertebral end plate fixed to the upper side of the intervertebral space, and the second locking portion is connected to the second hole, and the second locking portion sequentially penetrates cortical bone, cancellous bone, and lateral cortical bone of a vertebral end plate fixed to the lower side of the intervertebral space.
Further, in order to better implement the present invention, the number of the fixing structures is two, and the two fixing structures are symmetrically arranged.
Further, in order to better implement the present invention, the first locking portion and the second locking portion are both screws.
Compared with the prior art, the invention has the following beneficial effects:
the double-cortical elastic fixation fusion cage provided by the invention comprises a bone grafting supporting part and an elastic support fixing part which is used for supporting in the front part of an intervertebral space, wherein a bone grafting cavity used for filling bone grafting materials is arranged on the bone grafting supporting part, the elastic support fixing part and the bone grafting supporting part are connected together, a fixing structure is arranged on the elastic support fixing part, and the fixing structure can be sequentially connected onto end plate cortical bone, cancellous bone and lateral cortical bone of a vertebra in a penetrating way. Adopt this kind of structure, above-mentioned elastic support fixed part is compared in the hard titanium plate among the prior art, it can produce micro elastic deformation, low head at the user, the in-process of raising the head or turning round the head, this elastic support fixed part can reduce stress concentration and stress shielding through elastic deformation, thereby can reduce the fixed knot of postoperative constructs not hard up, withdraw from, bone absorption and the probability that phenomenon such as bone grafting does not fuse takes place, and the fixed knot who sets up on the elastic support fixed part can cross-under in proper order fix at vertebra end plate cortex of bone, cancellous bone and side cortex of bone, play better fixed effect, be particularly useful for osteoporosis's old patient, reduce whole fusion ware and produce not hard up probability in the vertebra clearance, thereby be favorable to bone grafting material to grow in the vertebra clearance.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic top view of a double-cortical elastic fixation cage in an embodiment of the present invention;
FIG. 2 is a front view schematic diagram of the structure shown in FIG. 1;
FIG. 3 is a left side view schematic of the structure of FIG. 1;
FIG. 4 is a schematic structural view of a first locking part and a second locking part when the first locking part and the second locking part are connected to an elastic support fixing part in an embodiment of the present invention;
fig. 5 is a sectional view of the elastic support fixing part in the embodiment of the present invention.
In the figure:
1-a bone grafting support; 11-bone graft cavity;
2-elastic support fixing part; 21-a hollow shell; 22-a flexible filler;
3-a first locking portion;
4-a second locking portion;
5-fine holes;
6-a convex part.
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 making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the present embodiments provide a double cortical elastic fixation cage for implantation anteriorly into a patient's cervical intervertebral space for bone grafting.
This two skin elastic fixation fuse ware is including planting bone supporting part 1 and elastic support fixed part 2, this bone supporting part 1 and elastic support fixed part 2 of should planting link together, specifically, bone supporting part 1 and elastic support fixed part 2 of planting can be connected through buckle or spherical hinge, the anterior connected mode with the rear portion of the fusion ware among this connected mode and the prior art is the same, so no longer give unnecessary detail to it here, after bone supporting part 1 is connected with elastic support fixed part 2, both can produce slight relative rotation.
When the double-cortical fusion cage provided by the embodiment is implanted into the cervical vertebra intervertebral space from the anterior way, the bone grafting supporting part 1 and the elastic supporting fixing part 2 are inserted into the intervertebral space, the elastic supporting fixing part 2 is supported at the front part of the intervertebral space, and the bone grafting supporting part 1 is supported at the rear part of the intervertebral space, namely, the bone grafting supporting part 1 and the elastic supporting fixing part 2 can be supported in the intervertebral space, the top ends of the two parts are connected with a vertebra at the upper side of the intervertebral space, and the bottom ends of the two parts are connected with a vertebra at the lower side of the intervertebral space, so that the support is formed. The bone grafting support part 1 is provided with a bone grafting cavity 11, and the bone grafting cavity 11 is used for filling bone grafting materials. When the bone graft support 1 is located at a predetermined position in the posterior part of the intervertebral space, the bone graft contained therein can grow.
Still install fixed knot on above-mentioned elastic support fixed part 2 and construct, this fixed knot construct can cross-under in proper order and fix on the end plate bone cortex of vertebra, cancellous bone and side bone cortex to it is fixed more firm, avoid whole two skin elastic fixation to fuse the ware and become flexible or drop. And above-mentioned elastic support fixed part 2 can also produce micro-deformation when forming the support, when the patient raised head or the lower head or when turning round the head, two upper and lower vertebrae extrusion elastic support fixed part 2 in intervertebral space, and elastic support fixed part 2 receives the extrusion then can produce micro-elastic deformation to reduce stress concentration and stress and shelter from, then can play the probability that reduction fixed knot constructs not hard up, withdraw from and bone absorption phenomenon takes place, thereby be favorable to more planting bone material and growing in intervertebral space.
In a preferred embodiment of the present invention, a plurality of through holes 5 are formed in the wall of the bone implantation cavity 11, and through the through holes 5, the nutrient substances in the intervertebral space can be introduced into the bone implantation cavity 11 to promote the growth of the bone implantation material.
Example 2:
in this embodiment, as a specific implementation manner of embodiment 1, in this embodiment, the elastic support fixing part 2 includes a flexible filler 22 and a hollow shell 21, the hollow shell 21 is surrounded by an upper side plate, a lower side plate, a front side plate, a rear side plate, a left side plate and a right side plate, the flexible filler 22 is filled in the hollow shell 21, the thicknesses of the upper side plate and the lower side plate are all defined as a, the thicknesses of the front side plate, the rear side plate, the left side plate and the right side plate are all defined as B, and a > B.
By adopting the structure, the upper side plate and the lower side plate are both plates which can not generate deformation, the front side plate, the rear side plate, the left side plate and the right side plate can generate micro elastic deformation, when the elastic support fixing part 2 is subjected to a first acting force from the vertical direction, the distance between the upper side plate and the lower side plate can generate micro elastic change by virtue of the deformation capability of the front side plate, the rear side plate, the left side plate and the right side plate and the flexibility of the flexible filler 22, and when the first acting force disappears, the distance between the upper side plate and the lower side plate returns to an initial state under the elastic action of the front side plate, the rear side plate, the left side plate, the right side plate and the flexible filler 22; when the elastic support fixing part 2 receives a second acting force from the side, the side plate group consisting of the front side plate, the rear side plate, the left side plate and the right side plate can generate micro lateral displacement or torsion by virtue of the deformation capacity of the front side plate, the rear side plate, the left side plate and the right side plate, and the elastic support fixing part is reset to the initial state when the second acting force disappears. Through this kind of structure, then can eliminate the pressure concentration and the pressure in the elastic support fixed part 2 well and shelter from the phenomenon to guarantee that bone grafting supporting part 1 can arrange predetermined position in better more accurately, thereby obtain better bone grafting effect.
As a best implementation manner of this embodiment, the upper side plate, the lower side plate, the front side plate, the rear side plate, the left side plate and the right side plate in this embodiment are all titanium plates, and the thicknesses of the upper side plate and the lower side plate are 1mm, so that the thicknesses of the upper side plate and the lower side plate are enough and hardly generate deformation, the thicknesses of the front side plate, the rear side plate, the left side plate and the right side plate are the same and are all limited to be B, and B is greater than or equal to 0.3mm and less than or equal to 0.5mm, so that the front side plate, the rear side plate, the left side plate and the right side plate can generate slight elastic deformation. Specifically, the side plate and the lower side plate are made of a common titanium plate, and the front side plate, the rear side plate, the left side plate and the right side plate are made of an elastic titanium plate.
As a more preferable embodiment of the present embodiment, the upper surface and/or the lower surface of the upper side plate and/or the lower surface of the lower side plate and/or the upper and lower surfaces of the bone grafting support part in the present embodiment are provided with protrusions 6, by means of which protrusions 6 the friction between the flexible support fixing part 2 and the side wall of the intervertebral space can be increased, so that the flexible support fixing part 2 is more stably fitted in the intervertebral space.
Example 3:
in this embodiment, as a specific implementation manner of the above embodiment, in this embodiment, the flexible filler 22 is a spring, and both ends of the spring are respectively abutted against the upper side plate and the lower side plate, and the spring is in a compressed state.
In another embodiment of this embodiment, the flexible filler 22 is a spring, and two ends of the spring are respectively abutted against the upper side plate and the lower side plate, and the spring is in a compressed state.
Example 4:
this embodiment is a best mode of the above embodiment, and in this embodiment, the fixing structure includes a first hole, a first locking portion 3, a second hole, and a second locking portion 4. Wherein, the first hole runs through the front side plate and the upper side plate, and the first hole faces to the back upper part and inclines to the side, the first locking part 3 is penetrated in the first hole and guided by the first hole and then is penetrated and fixed in the cortical bone, the cancellous bone and the cortical bone of the end plate of a vertebra at the upper side of the intervertebral space in turn. The second hole penetrates the anterior plate and the inferior plate, and the second hole is inclined toward the posterior inferior and toward the lateral side, and the second locking portion 4 is inserted into the second hole, guided by the second hole, and inserted and fixed in the cortical bone, the cancellous bone and the lateral cortical bone of the vertebral bone at the inferior side of the intervertebral space in turn.
Adopt above-mentioned structure, first locking portion 3 and second locking portion 4 are all connected to be fixed on two bone cortex (also end plate cortex lycii and side cortex lycii), thereby fix more firmly, and first locking portion 3 and second locking portion 4 all can be packed into from the curb plate department in the past, so the installation is simple and convenient more, at the fixed in-process of first locking portion and second locking portion, can not damage the spinal cord, the neural and vertebral artery of essence, the operation risk is lower, so it is more practical.
As a more preferable embodiment of the present embodiment, the number of the fixing structures in the present embodiment is two, and the two fixing structures are symmetrically disposed, so as to further reduce the phenomenon of stress concentration inside the elastic support fixing portion 2, and make the fixing more firm.
As a preferred embodiment of the present embodiment, the first locking portion 3 and the second locking portion 4 in the present embodiment are both screws, and the first hole and the second hole are both screw holes.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should 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. The utility model provides a fixed ware that fuses of two cortex elasticity which characterized in that: the bone grafting device comprises a bone grafting supporting part and an elastic supporting fixing part which is used for supporting the front part of a vertebral clearance, wherein a bone grafting cavity used for filling bone grafting materials is arranged on the bone grafting supporting part, the elastic supporting fixing part is connected with the bone grafting supporting part, and a fixing structure which is sequentially penetrated and fixed on cortical bone, cancellous bone and lateral cortical bone of a vertebral endplate is arranged on the elastic supporting fixing part;
the elastic support fixed part comprises a flexible filler and a hollow shell formed by splicing a front side plate, a rear side plate, an upper side plate, a lower side plate, a left side plate and a right side plate, the flexible filler is filled in the hollow shell, the upper side plate and the lower side plate are both A, the front side plate, the rear side plate, the left side plate and the right side plate are both B, and A is larger than B.
2. The double-cortical elastic fixation cage of claim 1, wherein: the front side plate, the rear side plate, the left side plate, the right side plate, the upper side plate and the lower side plate are all titanium plates, the thicknesses of the upper side plate and the lower side plate are all 1mm, the thicknesses of the front side plate, the rear side plate, the left side plate and the right side plate are all B, and B is more than or equal to 0.3mm and less than or equal to 0.5mm.
3. A double-cortical elastic fixation cage according to claim 2, wherein: the flexible filler is a spring, and two ends of the spring are respectively abutted to the upper side plate and the lower side plate.
4. A double-cortical elastic fixation cage according to claim 2, wherein: the flexible filler is a spring plate, and two ends of the spring plate are respectively abutted to the upper side plate and the lower side plate.
5. The double-cortical elastic fixation cage of claim 1, wherein: and the wall of the bone grafting cavity is provided with a plurality of through pores.
6. The double-cortical elastic fixation cage of claim 1, wherein: convex parts used for preventing slipping are arranged on the upper surface of the upper side plate and/or the lower surface of the lower side plate and/or the upper surface and the lower surface of the bone grafting supporting part.
7. A double-cortical elastic fixation cage according to any of claims 1-6, wherein: fixed knot constructs includes first hole, first locking portion, second hole and second locking portion, first hole is towards the back top and runs through towards side slope and this first hole preceding curb plate and go up the curb plate, the second hole is towards the back below and runs through towards side slope and this second hole preceding curb plate and down the curb plate, first locking portion is connected in the first hole and this first locking portion cross-under in proper order fix the end plate cortex lycii, cancellous bone and the side cortex lycii of a vertebra of vertebra clearance upside, second locking portion is connected in the second hole and this second locking portion cross-under in proper order fix the end plate cortex lycii, cancellous bone and the side cortex lycii of a vertebra of vertebra clearance below.
8. The double-cortical elastic fixation cage of claim 7, wherein: the number of the fixed structures is two, and the two groups of the fixed structures are symmetrically arranged.
9. The double-cortical elastic fixation cage of claim 7, wherein: the first locking portion and the second locking portion are both screws.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010479869.4A CN111631844B (en) | 2020-05-29 | 2020-05-29 | Double-skin elastic fixation fusion cage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010479869.4A CN111631844B (en) | 2020-05-29 | 2020-05-29 | Double-skin elastic fixation fusion cage |
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| CN111631844A CN111631844A (en) | 2020-09-08 |
| CN111631844B true CN111631844B (en) | 2022-12-23 |
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| CN109862839A (en) * | 2016-10-15 | 2019-06-07 | 拉梅什·库玛·森 | With the acetabular bone compression plate and its fixing means that double cortex are fixed |
| CN107485434A (en) * | 2017-08-18 | 2017-12-19 | 南京市六合区人民医院 | A kind of spinal vertebral booster and its manufacture method |
| CN108742953A (en) * | 2018-03-19 | 2018-11-06 | 唐小毛 | A kind of minimally invasive double cortex centrum screw self-stabilization type " ear " type lumbar intervertebral fusion devices |
| CN108852563A (en) * | 2018-04-12 | 2018-11-23 | 深圳清华大学研究院 | Zero incisura Invasive lumbar fusion device of anterior cervical vertebrae |
| CN110478091A (en) * | 2018-08-15 | 2019-11-22 | 莆田学院附属医院（莆田市第二医院） | A kind of lumbar intervertebral fusion device and its application |
| CN109481101A (en) * | 2018-12-28 | 2019-03-19 | 西安交通大学医学院第二附属医院 | A kind of anterior approach self-retaining artificial vertebral body |
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