CN113262085B - Anti-withdrawal and expandable interbody fusion cage - Google Patents
Anti-withdrawal and expandable interbody fusion cage Download PDFInfo
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- CN113262085B CN113262085B CN202110465636.3A CN202110465636A CN113262085B CN 113262085 B CN113262085 B CN 113262085B CN 202110465636 A CN202110465636 A CN 202110465636A CN 113262085 B CN113262085 B CN 113262085B
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- clamping ring
- rotating shaft
- ring groove
- groove
- limiting block
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- 230000004927 fusion Effects 0.000 title claims abstract description 61
- 230000002512 anti-withdrawal effect Effects 0.000 title claims abstract description 17
- 239000007943 implant Substances 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims description 11
- 230000001045 lordotic effect Effects 0.000 abstract description 4
- 230000000399 orthopedic effect Effects 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000002513 implantation Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 208000007623 Lordosis Diseases 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000007012 clinical effect Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000005036 nerve Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- 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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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses an anti-withdrawal and expandable interbody fusion cage, which belongs to the technical field of orthopedic implants and comprises a cage main body, wherein a transverse opening is formed in the middle of the front part of the cage main body, so that an upper expanding body and a lower expanding body are formed at the front part of the cage main body; the rear part of the fusion device main body is provided with a mounting channel, a rotating shaft penetrating through the front and rear directions of the fusion device main body is arranged in the mounting channel, the front part of the rotating shaft is inserted in the transverse opening and can prop up the upper prop up body and the lower prop up body after rotating, and a retreating-preventing and rotation-preventing structure used for preventing the rotating shaft from retreating and rotating is arranged in the mounting channel and at the rear part of the rotating shaft. Compared with the traditional fusion device, the anti-back-out and distractable intervertebral fusion device has the advantages of simple and convenient operation and reliable performance, can lead the gap at the front edge of the vertebral body to be larger than the gap at the rear edge, recover the physiological lordotic angle of the lumbar vertebra and has better self-stability.
Description
Technical Field
The invention relates to the technical field of orthopedic implants, in particular to an anti-withdrawal and expandable interbody fusion cage.
Background
The lumbar interbody fusion can effectively treat lumbar degeneration, instability and other characteristics, and can fuse upper and lower vertebral bodies, maintain the height of an intervertebral space, relieve the pressure of nerve roots and maintain the stability of a vertebral column; the clinical effect is satisfactory, the operation wound is small, and the operation is convenient.
In recent years, along with popularization of clinical application and progress of theoretical research, the inventor gradually discovers that the conventional fusion device has certain defects in the research process, such as poor self-stability performance of the fusion device, unsatisfactory lumbar vertebra physiological lordosis recovery after the vertebral fusion operation and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-withdrawal and expandable interbody fusion cage which has good self-stability and is ideal for recovering the physiological lordosis of lumbar vertebrae after operation.
In order to solve the technical problems, the invention provides the following technical scheme:
An anti-withdrawal distractable interbody fusion cage, comprising a cage body, wherein:
A transverse opening is arranged in the middle of the front part of the fusion device main body, so that an upper supporting body and a lower supporting body are formed at the front part of the fusion device main body;
The rear portion of fusion ware main part is equipped with the installation passageway, be equipped with in the installation passageway and run through the pivot of fusion ware main part fore-and-aft direction, the front portion of pivot is inserted and is established in the horizontal opening and can prop up after rotatory prop up body and lower prop up the body, in the installation passageway with the rear portion of pivot is equipped with and is used for preventing the pivot is withdrawed from and is prevented gyration structure with the back of preventing of gyration.
Further, prevent moving back and prevent gyration structure includes C shape snap ring, first snap ring recess and second snap ring recess, wherein:
The inner surface of the C-shaped clamping ring is polygonal, and the polygon is provided with at least 3 sides;
The first clamping ring groove is arranged in the mounting channel and used for accommodating the C-shaped clamping ring;
The second snap ring groove is arranged at the rear part of the rotating shaft and used for accommodating the C-shaped snap ring, and the second snap ring groove is a polygonal snap ring groove matched with the C-shaped snap ring.
Further, a first limiting block matched with the opening of the C-shaped clamping ring and used for preventing the rotating shaft from rotating after rotation is arranged in the first clamping ring groove.
Further, a second limiting block is arranged at the rear part of the rotating shaft, and a second limiting block groove matched with the second limiting block and used for preventing the rotating shaft from rotating after rotation is arranged in the mounting channel;
the mounting channel is internally provided with an arc-shaped avoidance groove for avoiding the second limiting block.
Further, prevent moving back and prevent gyration structure includes C shape snap ring, first snap ring recess and second snap ring recess, wherein:
the inner surface of the C-shaped clamping ring is circular;
The first clamping ring groove is arranged in the mounting channel and used for accommodating the C-shaped clamping ring;
The second snap ring groove is arranged at the rear part of the rotating shaft and used for accommodating the C-shaped snap ring, and the second snap ring groove is a circular snap ring groove.
Further, a third limiting block is arranged at the rear part of the rotating shaft, and a third limiting block groove matched with the third limiting block and used for preventing the rotating shaft from rotating after rotation is arranged in the mounting channel;
The mounting channel is internally provided with an arc-shaped avoidance groove for avoiding the third limiting block.
Further, an implantation end hole for accommodating the front part of the rotating shaft is formed in the middle of the front side wall of the fusion device main body, the front part of the rotating shaft is a rectangular head end, and the implantation end hole is rectangular.
Further, the middle part of the rotating shaft is cylindrical, and/or the driving part of the rotating shaft is positioned at the rear end of the rotating shaft.
Further, the upper surface and the lower surface of the fusion device main body are provided with inverted teeth.
Further, the upper surface and the lower surface of the implantation end hole are arc-shaped, a semicircular groove is formed in the middle of at least one side of the upper surface and the lower surface of the implantation end hole, and semicircular protrusions matched with the semicircular grooves are arranged on two sides of the front portion of the rotating shaft.
The invention has the following beneficial effects:
Compared with the traditional fusion device, the anti-back-out and distractable intervertebral fusion device has the advantages of simple and convenient operation and reliable performance, can lead the gap at the front edge of the vertebral body to be larger than the gap at the rear edge, recover the physiological lordotic angle of the lumbar vertebra and has better self-stability.
Drawings
FIG. 1 is a schematic view of the entire structure of the anti-back-out distractable interbody fusion cage of the present invention, wherein (a) is a front elevation view and (b) is a perspective view;
FIG. 2 is a schematic view of an exploded view of an embodiment 1 of the anti-distraction interbody fusion apparatus of the present invention;
FIG. 3 is a schematic cross-sectional view of the cage body of FIG. 2;
FIG. 4 is a schematic view of the structure of the spindle in FIG. 2;
FIG. 5 is a schematic view of the C-shaped snap ring of FIG. 2;
FIG. 6 is a schematic diagram of the mating relationship between the C-shaped snap ring and the first snap ring groove in FIG. 2, wherein (a) is a schematic diagram of the initial state, and (b) is a schematic diagram of the C-shaped snap ring rotated 90 degrees;
FIG. 7 is a schematic view of an exploded view of an embodiment 2 of the anti-distraction interbody fusion apparatus of the present invention;
FIG. 8 is a schematic cross-sectional view of the cage body of FIG. 7;
FIG. 9 is a schematic view of the structure of the spindle of FIG. 7;
FIG. 10 is a schematic diagram of the mating relationship between the C-shaped snap ring and the first snap ring groove in FIG. 7, wherein (a) is a schematic diagram of the initial state, and (b) is a schematic diagram of the C-shaped snap ring rotated 90 degrees;
Fig. 11 is a schematic view showing an improved structure of an implantation end hole and a rotation shaft in the middle of the front sidewall of a cage body in the anti-withdrawal and expandable interbody cage of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The invention provides an anti-withdrawal and expandable interbody fusion cage, which is shown in fig. 1-11, and comprises a fusion cage main body 1, wherein a vertical implantation hole 11 can be formed in the middle of the fusion cage main body 1 for facilitating bone grafting, and the fusion cage comprises:
A transverse opening 12 is arranged in the middle of the front part of the fusion device main body 1, so that an upper supporting body 13 and a lower supporting body 14 are formed at the front part of the fusion device main body 1;
The rear part of the fusion device main body 1 is provided with a mounting channel 15, a rotating shaft 2 penetrating through the front and rear directions of the fusion device main body 1 is arranged in the mounting channel 15, the front part of the rotating shaft 2 is inserted in the transverse opening 12 and can prop up the upper prop-up body 13 and the lower prop-up body 14 after rotating, and a retreating-preventing and rotation-preventing structure for preventing the rotating shaft 2 from retreating and rotating is arranged in the mounting channel 15 and at the rear part of the rotating shaft 2.
When the anti-back-out and expandable interbody fusion cage is used, after the interbody fusion cage is implanted into a human body, the rotating shaft 2 is driven to rotate by an instrument, so that the upper expanding body 13 and the lower expanding body 14 at the front part of the main body 1 of the interbody fusion cage are expanded at the front part of the rotating shaft 2, and the physiological lordotic angle of lumbar vertebrae of a patient is restored.
Compared with the traditional fusion device, the anti-back-out and distractable intervertebral fusion device has the advantages of simple and convenient operation and reliable performance, can lead the gap at the front edge of the vertebral body to be larger than the gap at the rear edge, recover the physiological lordotic angle of the lumbar vertebra and has better self-stability. The invention can fuse the upper and lower vertebral bodies, maintain the height of the intervertebral space, lighten the pressure of nerve roots and maintain the stability of the vertebral column, has satisfactory clinical effect, small operation wound and convenient operation. The invention is suitable for the posterior fusion fixation operation of the spine, and the fusion device is spread after implantation, so that the fusion device has better fixation and fusion performance, and the postoperative requirement of the fusion device is met.
The anti-back and anti-rotation structure has the advantages that all parts are mutually matched, the anti-back and anti-rotation function of the rotating shaft is realized, and the invention can have the following embodiments according to different structural forms of the anti-back and anti-rotation structure.
Example 1
As shown in fig. 2 to 6, the anti-withdrawal and anti-rotation structure includes a C-shaped snap ring 3, a first snap ring groove 151 and a second snap ring groove 21, and the C-shaped snap ring 3 cooperates with the first snap ring groove 151 and the second snap ring groove 21 to prevent the rotation shaft 2 from withdrawing from the cage body 1. Preferably, the inner surface of the C-shaped snap ring 3 is polygonal with at least 3 sides, e.g. the inner surface of the C-shaped snap ring 3 is triangular, square, pentagonal or hexagonal; a first snap ring groove 151 is provided in the mounting passage 15 for accommodating the C-shaped snap ring 3 (accommodating the outer side wall portion); the second snap ring groove 21 is provided at the rear portion of the rotating shaft 2 for accommodating the C-shaped snap ring 3 (accommodating the inner side wall portion), the second snap ring groove 21 is a polygonal snap ring groove which is matched with the C-shaped snap ring 3, in the embodiment shown in the drawings, the inner surface of the C-shaped snap ring 3 is square, and the second snap ring groove 21 is square snap ring groove. Further, a first stopper 1511 for preventing the rotating shaft 2 from rotating after rotation, which is engaged with the opening 31 of the C-shaped snap ring 3, may be provided in the first snap ring groove 151.
When the device is used, the C-shaped clamp ring 3 is elastically deformed by an instrument and is placed at the first clamp ring groove 151 in the mounting channel 15, the rotating shaft 2 is placed in the fusion device main body 1 through the C-shaped clamp ring 3, the rotating shaft 2 is driven by the instrument to rotate, the C-shaped clamp ring 3 is driven by the rotating shaft 2 to rotate, after the rotating shaft 2 rotates by 90 degrees, the upper supporting body 13 and the lower supporting body 14 are supported on the front part of the rotating shaft 2, and the opening 31 of the C-shaped clamp ring 3 is clamped with the first limiting block 1511 in the first clamp ring groove 151, so that the rotating shaft 2 is self-locked and limited (the rotating shaft 2 is prevented from rotating after rotation).
Example 2 (not shown)
The structure of this embodiment is substantially the same as that of embodiment 1, except that: a second limiting block is arranged at the rear part of the rotating shaft 2, and a second limiting block groove which is matched with the second limiting block and used for preventing the rotating shaft 2 from rotating after rotating is arranged in the installation channel 15; and, can be equipped with the arc that is used for dodging the second stopper in the installation passageway 15 dodges the recess.
When the device is used, the C-shaped clamp ring 3 is elastically deformed by an instrument and is placed at the first clamp ring groove 151 in the mounting channel 15, the rotating shaft 2 is placed in the fusion device main body 1 through the C-shaped clamp ring 3, then the rotating shaft 2 is driven by the instrument to rotate, the rotating shaft 2 drives the C-shaped clamp ring 3 to rotate, after the rotating shaft 2 rotates by 90 degrees, the upper supporting body 13 and the lower supporting body 14 are supported at the front part of the rotating shaft 2, and a second limiting block at the rear part of the rotating shaft 2 is clamped with a second limiting block groove in the mounting channel 15, so that the rotating shaft 2 is self-locked and limited (the rotating shaft 2 after rotation is prevented from rotating).
Example 3
As shown in fig. 7 to 10, the structure of this embodiment is substantially the same as that of embodiment 1, except that: the inner surface of the C-shaped snap ring 3' is circular, and a first snap ring groove 151 is provided in the mounting channel 15 for accommodating the C-shaped snap ring 3 (accommodating the outer side wall portion); a second snap ring groove 21 is provided at the rear of the rotation shaft 2 for accommodating the C-shaped snap ring 3 (accommodating the inner side wall portion), and the second snap ring groove 21 is a circular snap ring groove. In addition, a third limiting block 22 can be arranged at the rear part of the rotating shaft 2, and a third limiting block groove 152 which is matched with the third limiting block 22 and used for preventing the rotating shaft 2 from rotating after rotating is arranged in the installation channel 15; further, an arc avoidance groove 153 for avoiding the third limiting block 22 may be disposed in the installation channel 15. In the embodiment shown in fig. 10, the arc-shaped relief groove 153 is approximately in the 12-point to 2-point direction, the third stopper groove 152 is approximately in the 2-point to 3-point direction, and the adjacent/shared side wall between the arc-shaped relief groove 153 and the third stopper groove 152 is a circular protrusion (specifically, the height of the circular protrusion is preferably lower than the depth of the arc-shaped relief groove 153 and the third stopper groove 152), at this time, the third stopper 22 preferably has a beveled structure, so that the circular protrusion cooperates with the beveled structure of the third stopper 22, and the third stopper 22 can slide to the bottom of the third stopper groove 152 relatively easily, but cannot rotate after being trapped.
When the device is used, the C-shaped clamping ring 3 'is elastically deformed by the device and is placed at the first clamping ring groove 151 in the mounting channel 15, the rotating shaft 2 is placed in the fusion device main body 1 through the C-shaped clamping ring 3', the rotating shaft 2 is driven to rotate by the device, after the rotating shaft 2 rotates by 90 degrees, the upper supporting body 13 and the lower supporting body 14 are supported on the front part of the rotating shaft 2, and the third limiting block 22 at the rear part of the rotating shaft 2 is clamped with the third limiting block groove 152 in the mounting channel 15, so that the rotating shaft 2 is self-locked and limited.
It is understood that the anti-retreating and anti-rotation structure may adopt other rigid or elastic structures which are easily thought by those skilled in the art besides adopting a mode of matching the C-shaped snap ring with the first/second snap ring grooves, and will not be described in detail herein.
Each stopper can have two kinds of realization modes, firstly adopts the elastic component, and elasticity struts/expands when it changes in the corresponding stopper recess to the card is in the stopper recess, secondly adopts the rigid part that has the chamfer, and the chamfer can make the stopper easily advance difficult to the corresponding stopper recess and go out.
In the above embodiment, for stably expanding the upper expanding body 13 and the lower expanding body 14, the middle part of the front side wall of the fusion device main body 1 may be provided with an implantation end hole 16 for accommodating the front part of the rotating shaft 2, the front part of the rotating shaft 2 is a rectangular head end, the implantation end hole 16 is rectangular, and in the embodiment shown in the figure, the upper expanding body 13 and the lower expanding body 14 can be expanded after the rotating shaft 2 rotates 90 degrees. In order to make the upper and lower supporting bodies 13 and 14 more easily supported, circular openings 18 may be formed at the inner sides of the root portions of the upper and lower supporting bodies 13 and 14, so that the upper and lower supporting bodies have greater elasticity and are more easily supported. The middle part of the shaft 2 may be cylindrical so that the middle bone graft is not pushed out when the shaft 2 rotates.
In order to facilitate driving of the rotating shaft 2, a driving part of the rotating shaft 2 may be provided at the rear end of the rotating shaft 2, and the driving part may be driven by a hexagonal wrench in various manners, such as trilateral, quadrilateral, etc., which are easily conceivable to those skilled in the art. As shown in fig. 3, the upper surface and the lower surface of the fusion cage body 1 may be provided with the inverted teeth 17, so that the fusion cage body 1 is fixed on the end plates of the upper and lower vertebral bodies through the inverted teeth 17 to perform a firm and self-stabilizing function, and the upper surface and the lower surface of the fusion cage body 1 may be set to coincide with the curvature of the end plates of the human body to better bear the weight.
In the modified embodiment shown in fig. 11, in order to reduce friction between the front portion of the shaft 2 and the implantation tip hole 16, it is more convenient to open the upper and lower opening bodies 13 and 14, and the upper and lower surfaces of the implantation tip hole 16 are preferably arc-shaped. And, the middle part of at least one side in the upper surface and the lower surface of implant end hole 16 can be equipped with semi-circular recess 161, and pivot 2 front portion both sides are equipped with semi-circular protruding 24 with semi-circular recess 161 matched with, and they can not influence the normal strut of upper strut 13 and lower strut 14, and after upper strut 13 and lower strut 14 are propped up, semi-circular recess 161 can form the joint structure with semi-circular protruding 24, can be better prevent that pivot 2 from taking place the gyration after receiving the pressure of upper strut 13 and lower strut 14, also can be better prevent that pivot 2 from taking place the back at the front and back direction of fusion ware main part 1.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (5)
1. The anti-withdrawal and expandable interbody fusion cage is characterized by comprising a fusion cage main body (1), wherein a transverse opening (12) is arranged in the middle of the front part of the fusion cage main body (1), so that an upper expanding body (13) and a lower expanding body (14) are formed at the front part of the fusion cage main body (1);
The rear portion of fusion ware main part (1) is equipped with installation passageway (15), be equipped with in installation passageway (15) and run through pivot (2) of fusion ware main part (1) fore-and-aft direction, the front portion of pivot (2) is inserted and is established in transverse opening (12) and rotatory back can prop up body (13) and lower prop up body (14), be equipped with in installation passageway (15) with the rear portion of pivot (2) is used for preventing pivot (2) withdraw from and the anti-return structure of gyrating, wherein:
the anti-withdrawal and anti-rotation structure comprises a C-shaped clamping ring (3), a first clamping ring groove (151) and a second clamping ring groove (21), wherein the inner surface of the C-shaped clamping ring (3) is polygonal, and the polygon is provided with at least 3 sides; the first clamping ring groove (151) is arranged in the mounting channel (15) and is used for accommodating the C-shaped clamping ring (3); the second clamping ring groove (21) is arranged at the rear part of the rotating shaft (2) and is used for accommodating the C-shaped clamping ring (3), and the second clamping ring groove (21) is a polygonal clamping ring groove matched with the C-shaped clamping ring (3); a first limiting block (1511) which is matched with the opening (31) of the C-shaped clamping ring (3) and used for preventing the rotating shaft (2) from rotating after rotation is arranged in the first clamping ring groove (151);
Or the anti-withdrawal and anti-rotation structure comprises a C-shaped clamping ring (3), a first clamping ring groove (151) and a second clamping ring groove (21), wherein the inner surface of the C-shaped clamping ring (3) is polygonal, and the polygon is provided with at least 3 sides; the first clamping ring groove (151) is arranged in the mounting channel (15) and is used for accommodating the C-shaped clamping ring (3); the second clamping ring groove (21) is arranged at the rear part of the rotating shaft (2) and is used for accommodating the C-shaped clamping ring (3), and the second clamping ring groove (21) is a polygonal clamping ring groove matched with the C-shaped clamping ring (3); a second limiting block is arranged at the rear part of the rotating shaft (2), and a second limiting block groove matched with the second limiting block and used for preventing the rotating shaft (2) from rotating after rotating is arranged in the mounting channel (15); an arc avoidance groove for avoiding the second limiting block is formed in the mounting channel (15);
Or the anti-withdrawal and anti-rotation structure comprises a C-shaped clamping ring (3), a first clamping ring groove (151) and a second clamping ring groove (21), and the inner surface of the C-shaped clamping ring (3) is circular; the first clamping ring groove (151) is arranged in the mounting channel (15) and is used for accommodating the C-shaped clamping ring (3); the second clamping ring groove (21) is arranged at the rear part of the rotating shaft (2) and used for accommodating the C-shaped clamping ring (3), and the second clamping ring groove (21) is a circular clamping ring groove; a third limiting block (22) is arranged at the rear part of the rotating shaft (2), and a third limiting block groove (152) which is matched with the third limiting block (22) and used for preventing the rotating shaft (2) from rotating after rotating is arranged in the mounting channel (15); an arc-shaped avoidance groove (153) for avoiding the third limiting block (22) is formed in the installation channel (15).
2. The anti-withdrawal and distractable interbody fusion cage according to claim 1, wherein an implant end hole (16) for accommodating the front part of the rotating shaft (2) is provided in the middle of the front side wall of the cage body (1), the front part of the rotating shaft (2) is a rectangular head end, and the implant end hole (16) is rectangular.
3. The anti-withdrawal distractable interbody fusion cage according to claim 1, wherein the middle part of the shaft (2) is cylindrical and/or the driving part of the shaft (2) is located at the rear end of the shaft (2).
4. The anti-withdrawal distractable interbody fusion cage according to claim 1, characterized in that the upper and lower surfaces of the cage body (1) are provided with inverted teeth (17).
5. The anti-withdrawal and distractable interbody fusion cage according to claim 2, wherein the upper surface and the lower surface of the implant end hole (16) are arc-shaped, a semicircular groove (161) is provided in the middle of at least one side of the upper surface and the lower surface of the implant end hole (16), and semicircular protrusions (24) matched with the semicircular groove (161) are provided on both sides of the front part of the rotating shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110465636.3A CN113262085B (en) | 2021-04-28 | 2021-04-28 | Anti-withdrawal and expandable interbody fusion cage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110465636.3A CN113262085B (en) | 2021-04-28 | 2021-04-28 | Anti-withdrawal and expandable interbody fusion cage |
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| CN113262085A CN113262085A (en) | 2021-08-17 |
| CN113262085B true CN113262085B (en) | 2024-05-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113855343B (en) * | 2021-09-30 | 2022-11-25 | 燕山大学 | Reinforced type distractable porous interbody fusion cage |
| CN216777128U (en) * | 2021-11-05 | 2022-06-21 | 天津市天津医院 | Intervertebral implant capable of being expanded |
| CN115844599B (en) * | 2022-08-08 | 2023-08-22 | 北京纳通医疗科技控股有限公司 | Distractable fusion cage and design method thereof |
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| CN204411031U (en) * | 2014-12-01 | 2015-06-24 | 北京市富乐科技开发有限公司 | Strut type fusion device |
| CN105310805A (en) * | 2015-12-07 | 2016-02-10 | 北京市富乐科技开发有限公司 | Anti-retreat distraction anterior cervical spine fusion cage |
| CN107438417A (en) * | 2014-12-30 | 2017-12-05 | Ex技术有限责任公司 | Extensible Invasive lumbar fusion device |
| CN212592578U (en) * | 2020-03-18 | 2021-02-26 | 天津正天医疗器械有限公司 | Fusion cage with anti-back device and system thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8734495B2 (en) * | 2012-01-18 | 2014-05-27 | Globus Medical, Inc. | Securing fasteners |
| EP2948106B1 (en) * | 2013-01-24 | 2021-05-26 | BioSpine, LLC | Adjustable interbody fusion device |
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2021
- 2021-04-28 CN CN202110465636.3A patent/CN113262085B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204411031U (en) * | 2014-12-01 | 2015-06-24 | 北京市富乐科技开发有限公司 | Strut type fusion device |
| CN107438417A (en) * | 2014-12-30 | 2017-12-05 | Ex技术有限责任公司 | Extensible Invasive lumbar fusion device |
| CN105310805A (en) * | 2015-12-07 | 2016-02-10 | 北京市富乐科技开发有限公司 | Anti-retreat distraction anterior cervical spine fusion cage |
| CN212592578U (en) * | 2020-03-18 | 2021-02-26 | 天津正天医疗器械有限公司 | Fusion cage with anti-back device and system thereof |
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| CN113262085A (en) | 2021-08-17 |
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