CN221383941U - Spinal facet joint process joint fusion device - Google Patents
Spinal facet joint process joint fusion device Download PDFInfo
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- CN221383941U CN221383941U CN202322333005.3U CN202322333005U CN221383941U CN 221383941 U CN221383941 U CN 221383941U CN 202322333005 U CN202322333005 U CN 202322333005U CN 221383941 U CN221383941 U CN 221383941U
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- 210000002517 zygapophyseal joint Anatomy 0.000 title claims abstract description 50
- 230000004927 fusion Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 15
- 230000002512 anti-withdrawal effect Effects 0.000 claims abstract description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 15
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 239000007943 implant Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011282 treatment Methods 0.000 abstract description 3
- 201000005671 spondyloarthropathy Diseases 0.000 abstract description 2
- 238000002513 implantation Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 201000008482 osteoarthritis Diseases 0.000 description 3
- 206010003246 arthritis Diseases 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 210000005065 subchondral bone plate Anatomy 0.000 description 2
- 208000016285 Movement disease Diseases 0.000 description 1
- 208000008558 Osteophyte Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000000735 allogeneic effect Effects 0.000 description 1
- 210000001188 articular cartilage Anatomy 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005786 degenerative changes Effects 0.000 description 1
- 230000003412 degenerative effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 201000010934 exostosis Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 238000000554 physical therapy Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 208000005198 spinal stenosis Diseases 0.000 description 1
- 208000001413 spine osteoarthritis Diseases 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 210000001258 synovial membrane Anatomy 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The utility model discloses a spinal facet joint fusion device, which comprises a screw fixing part, wherein a facet joint gap gasket part is integrally formed at the rear part of the screw fixing part in the longitudinal axis direction, the screw fixing part comprises a fixing body, and two screw mounting holes are formed in the fixing body; the small joint gap gasket part comprises a gasket body, and the front end of the gasket body is integrally connected with the rear end of the fixed body; the rear edge of the gasket body is provided with an embedded tenon, and the thickness of the embedded tenon is gradually reduced from front to back along the longitudinal axis direction; the left side surface and the right side surface of the gasket body are respectively and uniformly provided with a plurality of rows of anti-withdrawal barbs, and the direction of the anti-withdrawal barbs faces the screw fixing part. The device can fuse the diseased facet joint at the early stage of the spondyloarthritis, and greatly reduces the incidence rate of a series of subsequent clinical problems caused by poor conservative treatment effects, including pain and slippage caused by lumbar instability.
Description
Technical Field
The utility model belongs to the technical field of medical supplies, relates to a spinal medical supply, and in particular relates to a spinal facet joint process joint fusion device.
Background
Osteoarthritis (Facet Joint Osteoarthritis, FJOA) of the spinal facet joint is a disease which develops highly in people over 40 years old and is a disease which is mainly characterized by a series of degenerative pathological changes and clinical features occurring under the action of various factors, such as synovium, articular cartilage, subchondral bone, joint space and collateral tissues of the spinal facet joint. Research shows that the prevalence rate of the osteoarthritis of the spine in people over 40 years old in China: 46.0% for lumbar vertebra and 48.5% for cervical vertebra. Patients with osteoarthritis of the spinal facet joint often have clinical manifestations of local pain, neck or waist movement disorder and other different degrees, if no positive intervention is performed, as the disease further progresses, the joint process joint is seriously proliferated and the biomechanical performance is reduced, the poor consequences of instability of the intervertebral space, vertebral body slipping, spinal canal stenosis and the like can be caused, and the life quality of the patients is seriously influenced.
However, there is currently no clinically effective therapeutic measure for spinal facet arthritis characterized by narrowing of the joint space, subchondral bone sclerosis, osteophyte formation, and subchondral capsule changes. For early patients, only conservative treatments such as local braking, physiotherapy, medicines, local sealing and the like can be performed; and for patients with nervous symptoms caused by the instability, the slipping and the spinal stenosis of the intervertebral space in the late stage, the intervertebral fusion operation of the spinal column can be performed, the trauma is large, the risk is high, and the medical cost and the social burden are greatly increased.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a spinal facet joint fusion device which solves the clinical technical problem that no special medical products for spinal facet joint fusion exist in the prior art aiming at the spinal facet joint arthritis.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The utility model provides a backbone facet joint apophysis joint fusion device, includes screw fixation portion, and the rear portion integrated into one piece of screw fixation portion's longitudinal axis direction is provided with facet joint clearance pad portion, and facet joint clearance pad portion is perpendicular to screw fixation portion longitudinal axis direction's preceding terminal surface and with screw fixation portion's major axis direction looks perpendicular setting.
The screw fixing part comprises a fixing body, two screw mounting holes are formed in the fixing body, the two screw mounting holes are distributed side by side along the long axis direction, and the two screw mounting holes are respectively located on two sides of the plane where the small joint gap gasket part is located.
The small joint gap gasket part comprises a gasket body, and the front end of the gasket body is integrally connected with the rear end of the fixed body; the rear edge of the gasket body is provided with an embedded tenon, and the thickness of the embedded tenon is gradually reduced from front to back along the longitudinal axis direction; the left side and the right side of the gasket body are respectively and uniformly provided with a plurality of rows of anti-withdrawal barbs, and the direction of the anti-withdrawal barbs faces the screw fixing part.
The utility model also has the following technical characteristics:
Two sides of the fixed body along the short axis direction are respectively provided with a holding groove.
The width of the embedded tenon along the longitudinal axis direction is one fourth of the total width of the gasket body along the longitudinal axis direction.
The gasket body on still be provided with about link up the bone grafting hole of gasket body.
An implantation pushing hole is also arranged between the two screw mounting holes.
The screw mounting holes are screw mounting holes capable of adjusting the mounting angle of the locking screw.
The screw mounting hole include and offer the through-hole on fixed body, offered the spherical chamber that the diameter is greater than the through-hole internal diameter in the through-hole, the front end in spherical chamber is linked together with the front end of through-hole, the rear end in spherical chamber is linked together with the rear end of through-hole.
The spherical cavity in install the spheroid that can move about in the spherical cavity, the front end processing of spheroid is planar preceding terminal surface, the rear end processing of spheroid is planar rear end face, form spacing arch between the front end of spherical cavity and the front end of through-hole, spacing arch can be with preceding terminal surface contact realization to the spacing of spheroid.
The ball body on set up the screw hole that link up the preceding terminal surface and the rear end face of ball body, the screw hole can cooperate the installation with locking screw, the activity of ball body drives the activity of screw hole to realize locking screw's installation angle's regulation.
The front end face and the rear end face are arranged in a non-parallel manner, and the distance between the rear end face and the front end face is gradually reduced from outside to inside along the long axis direction; the inner wall of the spherical cavity is respectively provided with a sliding groove at the outer side and the inner side in the long axis direction, the sliding grooves are distributed along the longitudinal axis direction, the front end and the rear end of the sliding grooves along the longitudinal axis direction are closed, the spherical body is fixedly provided with a sliding block, the sliding block is assembled in the sliding grooves to enable the spherical body to swing in a one-way reciprocating manner in the spherical cavity, and the threaded holes are driven to swing in a one-way reciprocating manner.
Compared with the prior art, the utility model has the following technical effects:
The device of the utility model can fuse the diseased facet joint in the early stage of the spondyloarthritis, and greatly reduce the occurrence rate of a subsequent series of clinical problems caused by poor conservative treatment effects, including pain and slippage caused by lumbar instability.
(II) the device of the utility model can perform the osteosynthesis and long-term stabilization of the facet joint space when the degenerative change occurs in the facet joint of the spine.
(III) the device of the utility model has the advantages of minimally invasive surgery and simple operation.
Drawings
Fig. 1 is a schematic view of the overall structure of a spinal facet joint fusion device.
Fig. 2 is a schematic elevational view of a spinal facet joint fusion device.
Fig. 3 is a schematic view of a screw mounting hole capable of adjusting a mounting angle of a locking screw.
Fig. 4 is a schematic view showing an installation angle adjustment state of the locking screw.
The meaning of each reference numeral in the figures is: 1-screw fixation, 2-facet joint spacer section, 3-locking screw.
101-Fixing body, 102-screw mounting hole, 103-holding groove, 104-implantation pushing hole.
10201-Through holes, 10202-spherical cavities, 10203-spherical bodies, 10204-front end faces, 10205-rear end faces, 10206-limit protrusions, 10207-threaded holes, 10208-sliding grooves and 10209-sliding blocks.
201-Gasket body, 202-embedding tenon, 203-preventing back-out barb, 204-bone grafting hole.
The following examples illustrate the utility model in further detail.
Detailed Description
All parts and tools of the present utility model are known in the art unless otherwise specified.
In the utility model, the long axis direction, the short axis direction and the longitudinal axis direction are mutually perpendicular. The two ends in the longitudinal axis direction are respectively a front end and a rear end, the two ends in the long axis direction are respectively a left end and a right end, and the two ends in the short axis direction are respectively an upper end and a lower end.
The following specific embodiments of the present utility model are provided, and it should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present utility model fall within the protection scope of the present utility model.
Example 1:
The present embodiment provides a spinal facet joint fusion device, as shown in fig. 1 and 2, including a screw fixing portion 1, where a facet joint spacer portion 2 is integrally formed at a rear portion of the screw fixing portion 1 in a longitudinal axis direction, and the facet joint spacer portion 2 is perpendicular to a front end surface of the screw fixing portion 1 in the longitudinal axis direction and is perpendicular to the longitudinal axis direction of the screw fixing portion 1.
The screw fixing portion 1 includes a fixing body 101, two screw mounting holes 102 are formed in the fixing body 101, the two screw mounting holes 102 are arranged side by side along the long axis direction, and the two screw mounting holes 102 are respectively located at two sides of the plane where the facet joint spacer portion 2 is located.
The small joint clearance gasket part 2 comprises a gasket body 201, and the front end of the gasket body 201 is integrally connected with the rear end of the fixed body 101; the rear edge of the gasket body 201 is provided with an implantation tenon 202, and the thickness of the implantation tenon 202 is gradually reduced from front to rear along the longitudinal axis direction; a plurality of rows of withdrawal prevention barbs 203 are uniformly distributed on the left and right side surfaces of the gasket body 201, and the direction of the withdrawal prevention barbs 203 faces the screw fixing part 1.
As a preferable aspect of the present embodiment, one holding groove 103 is provided on each of both side surfaces of the fixing body 101 in the short axis direction. The holding groove 103 facilitates the implantation of the entire spinal facet joint fusion device using the holding device during surgery.
As a preferred embodiment of the present embodiment, the width of the insert tenon 202 along the longitudinal axis is one-fourth of the total width of the shim body 201 along the longitudinal axis. The implant tenon facilitates implantation of the facet joint spacer section along the facet joint space.
As a preferable scheme of the present embodiment, the spacer body 201 is further provided with bone grafting holes 204 penetrating the spacer body 201 from left to right. Bone graft holes 204 facilitate implantation with autologous or allogeneic bone, thereby increasing the rate of joint space fusion.
As a preferred aspect of the present embodiment, an implant advancement hole 104 is also provided between the two screw mounting holes 102. Implant advancement hole 104 facilitates insertion of the entire spinal facet joint fusion device into the facet joint space by insertion of a tool into implant advancement hole 104.
In this embodiment, the fixing body 101 has an irregular structure, and the gasket body 201 has an irregular flat structure.
In this embodiment, the material of the spinal facet joint fusion device is a commonly used medical implant material, for example, a medical implant material such as titanium alloy that can be implanted into a human body. The same materials as the known locking screw 3 can also be used.
When the utility model is used, firstly, the unilateral or bilateral facet joint process joint gap is exposed, a curet is used for treating the articular process joint surface of the lower part of the upper vertebral body and the articular process joint surface of the upper part of the lower vertebral body, cartilage is scraped until cortical bone is reached, and a bone fusion bed is prepared by using bone rubbing. The groove 103 is clamped by a clamping device, so that the spinal facet joint fusion device is clamped, the facet joint spacer part 2 is clamped along the direction of the preprocessed joint gap, the tail part of the clamping device is knocked by a bone hammer, or a rod-shaped tool embedded into the pushing hole 104 is knocked by the bone hammer, the spinal facet joint fusion device is placed into the interior of the articular process, gradually deepens until the end parts of the screw fixing part 1 in the longitudinal axis direction are respectively in close contact with the upper articular process bone and the lower articular process bone, then two locking screws 3 are screwed into the screw mounting holes 102 through the screw mounting holes 102 respectively, and the two locking screws 3 are fixed in the upper articular process bone and the lower articular process bone of the adjacent vertebral bodies respectively until the locking screws 3 are locked and fixed firmly.
Example 2:
The present embodiment provides a spinal facet joint fusion device, which includes all the structural features and the use process of the spinal facet joint fusion device of embodiment 1, on the basis that, since the directions of the lumbar facet joint surfaces of different patients are different, the directions in which the bone screws are screwed into the locking screws may be different, and therefore, it is further preferable that the screw mounting holes 102 are screw mounting holes capable of adjusting the mounting angle of the locking screws 3.
As a preferable scheme of the present embodiment, as shown in fig. 3 and 4, the screw mounting hole 102 includes a through hole 10201 opened on the fixing body 101, a spherical cavity 10202 having a diameter larger than an inner diameter of the through hole 10201 is opened in the through hole 10201, a front end of the spherical cavity 10202 is communicated with a front end of the through hole 10201, and a rear end of the spherical cavity 10202 is communicated with a rear end of the through hole 10201.
The spherical cavity 10202 is internally provided with a spherical body 10203 capable of moving in the spherical cavity 10202, the front end of the spherical body 10203 is processed into a planar front end face 10204, the rear end of the spherical body 10203 is processed into a planar rear end face 10205, a limiting protrusion 10206 is formed between the front end of the spherical cavity 10202 and the front end of the through hole 10201, and the limiting protrusion 10206 can be in contact with the front end face 10204 to limit the spherical body 10203.
The spherical body 10203 is provided with a threaded hole 10207 which penetrates through the front end surface 10204 and the rear end surface 10205 of the spherical body, the threaded hole 10207 can be matched with the locking screw 3 for installation, and the movement of the spherical body 10203 drives the movement of the threaded hole 10207, so that the installation angle of the locking screw 3 is adjusted.
In this embodiment, the aperture of the threaded hole 10207 is smaller than the aperture of the through hole 10201.
Example 3:
The present embodiment provides a spinal facet joint fusion device, which includes all structural features and a use process of the spinal facet joint fusion device of embodiment 2, and further preferably, as shown in fig. 3 and fig. 4, the front end face 10204 and the rear end face 10205 are arranged in a non-parallel manner, and a distance between the rear end face 10205 and the front end face 10204 gradually decreases from outside to inside along a long axis direction; the inner wall of the spherical cavity 10202 is respectively provided with a sliding groove 10208 on the outer side and the inner side of the long axis direction, the sliding grooves 10208 are distributed along the longitudinal axis direction, the front end and the rear end of the sliding grooves 10208 along the longitudinal axis direction are both closed, the spherical body 10203 is fixedly provided with a sliding block 10209, the sliding block 10209 is assembled in the sliding grooves 10208 to slide, so that the spherical body 10203 swings in the spherical cavity 10202 in a one-way reciprocating manner, and the threaded hole 10207 swings in the one-way reciprocating manner.
Claims (8)
1. The spinal facet joint fusion device is characterized by comprising a screw fixing part (1), wherein a facet joint gap gasket part (2) is integrally formed at the rear part of the screw fixing part (1) in the longitudinal axis direction, and the facet joint gap gasket part (2) is perpendicular to the front end surface of the screw fixing part (1) in the longitudinal axis direction and is perpendicular to the long axis direction of the screw fixing part (1);
The screw fixing part (1) comprises a fixing body (101), two screw mounting holes (102) are formed in the fixing body (101), the two screw mounting holes (102) are arranged side by side along the long axis direction, and the two screw mounting holes (102) are respectively positioned at two sides of a plane where the facet joint gap gasket part (2) is positioned;
The small joint clearance gasket part (2) comprises a gasket body (201), wherein the front end of the gasket body (201) is integrally connected with the rear end of the fixed body (101); the rear edge of the gasket body (201) is provided with an embedded tenon (202), and the thickness of the embedded tenon (202) is gradually reduced from front to back along the longitudinal axis direction; a plurality of rows of anti-withdrawal barbs (203) are uniformly distributed on the left side surface and the right side surface of the gasket body (201), and the direction of the anti-withdrawal barbs (203) faces the screw fixing part (1).
2. The fusion device of the facet joint according to claim 1, wherein the fixing body (101) is provided with a holding groove (103) on each of two sides along the short axis direction.
3. The spinal facet joint fusion device according to claim 1 wherein the width of the implant tenon (202) along the longitudinal axis is one-fourth of the total width of the spacer body (201) along the longitudinal axis.
4. The fusion device of the facet joint according to claim 1, wherein the spacer body (201) is further provided with bone grafting holes (204) penetrating the spacer body (201) from left to right.
5. The spinal facet joint fusion device according to claim 1, wherein an implant advancement hole (104) is further provided between the two screw mounting holes (102).
6. The spinal facet joint fusion device according to claim 1, wherein the screw mounting hole (102) is a screw mounting hole capable of adjusting a mounting angle of the locking screw (3).
7. The fusion device of the spinal facet joint according to claim 1 or 6, wherein the screw mounting hole (102) comprises a through hole (10201) formed in the fixing body (101), a spherical cavity (10202) with a diameter larger than the inner diameter of the through hole (10201) is formed in the through hole (10201), the front end of the spherical cavity (10202) is communicated with the front end of the through hole (10201), and the rear end of the spherical cavity (10202) is communicated with the rear end of the through hole (10201);
A spherical body (10203) capable of moving in the spherical cavity (10202) is arranged in the spherical cavity (10202), the front end of the spherical body (10203) is processed into a planar front end face (10204), the rear end of the spherical body (10203) is processed into a planar rear end face (10205), a limiting protrusion (10206) is formed between the front end of the spherical cavity (10202) and the front end of the through hole (10201), and the limiting protrusion (10206) can be in contact with the front end face (10204) to limit the spherical body (10203);
The spherical body (10203) is provided with a threaded hole (10207) penetrating through the front end face (10204) and the rear end face (10205) of the spherical body, the threaded hole (10207) can be matched with the locking screw (3) for installation, and the movement of the spherical body (10203) drives the movement of the threaded hole (10207), so that the installation angle of the locking screw (3) is adjusted.
8. The fusion device of the spinous process of claim 7, wherein the anterior face (10204) and the posterior face (10205) are disposed in a non-parallel manner, and the distance between the posterior face (10205) and the anterior face (10204) decreases gradually from the outside to the inside along the long axis; the inner wall of the spherical cavity (10202) is provided with a sliding groove (10208) on the outer side and the inner side of the long axis direction respectively, the sliding groove (10208) is distributed along the longitudinal axis direction, the front end and the rear end of the sliding groove (10208) along the longitudinal axis direction are both closed, the spherical body (10203) is fixedly provided with a sliding block (10209), the sliding block (10209) is assembled in the sliding groove (10208) to slide, so that the spherical body (10203) swings in the spherical cavity (10202) in a one-way reciprocating manner, and the threaded hole (10207) is driven to swing in the one-way reciprocating manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322333005.3U CN221383941U (en) | 2023-08-29 | 2023-08-29 | Spinal facet joint process joint fusion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322333005.3U CN221383941U (en) | 2023-08-29 | 2023-08-29 | Spinal facet joint process joint fusion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221383941U true CN221383941U (en) | 2024-07-23 |
Family
ID=91930286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322333005.3U Active CN221383941U (en) | 2023-08-29 | 2023-08-29 | Spinal facet joint process joint fusion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221383941U (en) |
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2023
- 2023-08-29 CN CN202322333005.3U patent/CN221383941U/en active Active
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