Self-locking device for interbody fusion cage

Abstract

The utility model belongs to the technical field of orthopedic implants, and particularly relates to a self-locking device for an interbody fusion cage, which comprises an interbody fusion cage body and a self-locking device connected with the interbody fusion cage body. The interbody fusion cage body is of a rectangular hollow structure, open grooves are formed in the upper surface and the lower surface of the interbody fusion cage body, inserting rods are arranged in the open grooves, the tail ends of the inserting rods are connected with the self-locking device, the self-locking device comprises a first fixing end and a second fixing end arranged at one end of the first fixing end, and the second fixing end comprises a first connecting plate and a second connecting plate. A first clamping plate and a second clamping plate are arranged between the first connecting plate and the second connecting plate; a third clamping plate and a fourth clamping plate are arranged on two sides above the first connecting plate and the second connecting plate; according to the self-locking device, the bone fusion rate of the interbody fusion cage can be guaranteed, meanwhile, the bone implantation stability of the interbody fusion cage is improved, secondary injury to a patient caused by falling or sliding of the interbody fusion cage is avoided, and then the treatment efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of orthopedic implants, and in particular relates to a self-locking device for an intervertebral fusion device. Background Art

[0002] With the aging trend of my country's population, the incidence of lumbar degenerative diseases and other lesions has gradually increased, so the demand for intervertebral fusion is also increasing. Intervertebral fusion can effectively treat lumbar degeneration and instability. It can fuse the upper and lower vertebrae, maintain the height of the intervertebral space, reduce the pressure on the nerve roots, maintain the stability of the spine, and is widely used in the lumbar spine, cervical spine and other parts.

[0003] In recent years, with the promotion of clinical applications and the progress of theoretical research, intervertebral fusion devices have been continuously developing. The materials used have evolved from autologous bone transplantation at the beginning to metal titanium with better bone ingrowth. However, metal titanium will produce artifacts during surgery and easily cause intervertebral collapse after surgery, so it has been gradually eliminated. Then came peek (polyetheretherketone) material, which has been sought after by doctors because it does not produce artifacts and has good biocompatibility.

[0004] Various intervertebral fusion devices disclosed in the prior art generally have the problems of poor stability during bone implantation, easy falling off, low bone fusion rate and poor treatment effect. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a self-locking device for an intervertebral fusion device, which solves the problems of poor stability of the existing intervertebral fusion device during bone implantation, easy fall-off of the intervertebral fusion device and low bone fusion rate.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a self-locking device for an intervertebral fusion device, comprising an intervertebral fusion device body and a self-locking device connected to the intervertebral fusion device body;

[0007] The intervertebral fusion device body is a rectangular hollow structure, and its upper and lower surfaces are both provided with grooves. A plug rod is arranged in the groove, and the end of the plug rod is connected to the self-locking device. The self-locking device includes a first fixed end and a second fixed end arranged at one end of the first fixed end. The second fixed end includes a first connecting plate and a second connecting plate. A first clamping plate and a second clamping plate are arranged between the first connecting plate and the second connecting plate; a third clamping plate and a fourth clamping plate are arranged on both sides above the first connecting plate and the second connecting plate.

[0008] The beneficial effects of adopting the above technical solution are: the stability of the intervertebral fusion device during implantation can be improved by the insertion rod, and the self-locking device connected to the insertion rod can be used as a bone grafting channel and prevent the insertion rod from falling off during use, thereby improving the stability and fusion efficiency of the intervertebral fusion device during bone implantation, which can effectively shorten the patient's treatment time and improve the treatment efficiency.

[0009] At the same time, the self-locking device is an integrated structure with a simple structure, small size, and easy and quick installation. The third clamping plate and the fourth clamping plate are used to fix the insertion rod, which can effectively prevent the insertion rod from falling out, and the first clamping plate and the second clamping plate are used to fix the intervertebral fusion device body, which improves the stability between the self-locking device and the intervertebral fusion device body. Through the coordinated use of the intervertebral fusion device, the insertion rod and the self-locking device, the bone fusion rate of the intervertebral fusion device can be guaranteed while the bone implantation stability of the intervertebral fusion device can be improved, thereby avoiding secondary damage to the patient caused by the detachment or sliding of the intervertebral fusion device, thereby improving the bone fusion rate and treatment efficiency.

[0010] Furthermore, a threaded hole is arranged in the middle of the first fixed end, and the threaded hole passes through the second fixed end.

[0011] The beneficial effects of adopting the above technical solution are as follows: the second fixed end is fitted with the intervertebral fusion device, the second fixed end is a hollow structure, and the threaded hole is set through the second fixed end. When installing the intervertebral fusion device, the special insertion tool is installed through the threaded hole of the first fixed end. After the intervertebral fusion device is installed in place, the special insertion tool is removed and the bone implantation tool is replaced. At this time, the threaded hole is used as a bone grafting channel; the self-locking device can improve the implantation stability of the intervertebral fusion device, and avoid secondary damage to the patient caused by the intervertebral fusion device falling off or sliding.

[0012] Furthermore, the first connecting plate and the second connecting plate are C-shaped, and their openings are arranged facing each other; a first fixing groove is arranged between the first connecting plate and the second connecting plate.

[0013] The beneficial effects of adopting the above technical solution are as follows: the second fixed end is composed of a C-shaped first connecting plate and a second connecting plate, and a gap is set between the first connecting plate and the second connecting plate to form a first fixing groove for fixing the first clamping plate and the second clamping plate, and the first fixing groove provides movement space for the first clamping plate and the second clamping plate, so as to facilitate the first clamping plate and the second clamping plate to adjust the fixed position of the intervertebral fusion device and prevent the self-locking device from falling off from the intervertebral fusion device.

[0014] Furthermore, a first buckle is disposed at the end of the first clamping plate and the end of the second clamping plate, and the first buckle is connected to the first clamping plate and the second clamping plate in an arc shape.

[0015] The beneficial effect of adopting the above technical solution is that the self-locking device can be easily fixed on the intervertebral fusion device through the first buckle.

[0016] Furthermore, a second buckle is disposed at the end of the third clamping plate and the end of the fourth clamping plate, and the second buckle is connected to the third clamping plate and the fourth clamping plate in an arc shape.

[0017] The beneficial effect of adopting the above technical solution is: the self-locking device can be easily fixed to the insertion rod through the second buckle, which can effectively prevent the insertion rod from falling out, and can also make the insertion rod have no protruding structure after assembly, thereby preventing the patient's soft tissue from being worn due to protrusion or falling off of the insertion rod.

[0018] Furthermore, the first clamping plate, the second clamping plate, the third clamping plate and the fourth clamping plate are all made of elastic material.

[0019] The beneficial effects of adopting the above technical solution are: the first clamping plate, the second clamping plate, the third clamping plate and the fourth clamping plate made of elastic material are conducive to the self-locking device to be adjusted according to the intervertebral fusion device, thereby improving the applicability of the device.

[0020] Furthermore, a second fixing groove is provided at one end of the intervertebral fusion device body, an implantation hole is provided at the bottom end of the second fixing groove, and first clamping grooves matching with the first buckle are provided on both sides thereof.

[0021] The beneficial effect of adopting the above technical solution is that the first buckle in the self-locking device is used in conjunction with the first locking groove to achieve stable fixation between the self-locking device and the intervertebral fusion cage.

[0022] Furthermore, a fixing block is provided at the end of the insertion rod, and a second slot is provided on the fixing block, and the second slot matches the second buckle.

[0023] The beneficial effect of adopting the above technical solution is that the second buckle of the self-locking device is matched and fixed with the second slot of the insertion rod, which can effectively prevent the insertion rod from falling out and improve the stability of the intervertebral fusion device during placement.

[0024] Furthermore, an inverted tooth is provided at one end of the insertion rod away from the fixing block.

[0025] Furthermore, the inverted teeth are arranged in 1-5 groups.

[0026] The beneficial effects of adopting the above technical solution are: the stability of the intervertebral fusion device during insertion can be improved by inserting the rod, and after the bone is implanted, the cancellous bone will grow into the inverted teeth, further improving the stability of the intervertebral fusion device.

[0027] In summary, the self-locking device for an intervertebral fusion device provided by the utility model has the following beneficial effects: the self-locking device is an integrated structure with a simple structure, small size, easy installation and disassembly, and is made of elastic material. Through the coordinated use of the intervertebral fusion device, the insertion rod and the self-locking device, it can not only ensure the bone fusion rate of the intervertebral fusion device, but also improve the bone implantation stability of the intervertebral fusion device, avoid secondary damage to the patient caused by the intervertebral fusion device falling off or sliding, thereby improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the combination of the utility model;

[0029] Figure 2 It is a combined cross-sectional view of the utility model;

[0030] Figure 3 The structure diagram of the self-locking device in the utility model is shown in FIG. Figure 1 ;

[0031] Figure 4 The structure diagram of the self-locking device of the utility model is shown in FIG. Figure 2 ;

[0032] Figure 5 This is a schematic diagram of the structure of the intervertebral fusion device in the utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the plug rod in the utility model;

[0034] Among them, 1. intervertebral fusion device body; 11. slot; 12. insertion rod; 13. second fixing slot; 14. implantation hole; 15. first clamping slot; 16. fixing block; 17. second clamping slot; 18. inverted teeth; 2. self-locking device; 21. first fixed end; 211. threaded hole; 22. second fixed end; 221. first connecting plate; 222. second connecting plate; 223. first fixing slot; 23. first clamping plate; 24. second clamping plate; 25. third clamping plate; 26. fourth clamping plate; 27. first buckle; 28. second buckle. DETAILED DESCRIPTION

[0035] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0036] like Figure 1 and Figure 2As shown, the self-locking device for an intervertebral fusion device provided by the utility model comprises an intervertebral fusion device body 1 and a self-locking device 2 connected to the intervertebral fusion device body 1; the intervertebral fusion device body 1 is a rectangular hollow structure, and its upper and lower surfaces are both provided with grooves 11, and a rod 12 is provided in the groove 11, and the end of the rod 12 is connected to the self-locking device 2; the stability of the intervertebral fusion device during implantation can be improved by the rod 12, and the self-locking device 2 connected to the rod 12 can be used as a bone grafting channel, and can also prevent the rod 12 from falling off during use, thereby improving the stability and fusion efficiency of the intervertebral fusion device during bone implantation, and can effectively shorten the treatment time of the patient, and through the coordinated use of the intervertebral fusion device, the rod 12 and the self-locking device 2, while ensuring the bone fusion rate of the intervertebral fusion device, the bone implantation stability of the intervertebral fusion device is improved, and the secondary injury to the patient caused by the falling off or sliding of the intervertebral fusion device is avoided, thereby improving the bone fusion rate and treatment efficiency.

[0037] like Figure 5 As shown, a second fixing groove 13 is provided at one end of the intervertebral fusion device body 1, an implantation hole 14 is provided at the bottom end of the second fixing groove 13, and first clamping grooves 15 are provided on both sides thereof. The first clamping grooves 15 can be used to fix the self-locking device 2, and the surface of the intervertebral fusion device is provided with a porous structure, which can not only improve the stability of the intervertebral fusion device, but also facilitate the growth and fusion of bone chips inside the intervertebral fusion device, thereby improving the treatment efficiency.

[0038] like Figure 6 As shown, a fixing block 16 is provided at the end of the insertion rod 12, a second slot 17 is provided on the fixing block 16, and 1 to 5 groups of inverted teeth 18 are provided at the end of the insertion rod 12 away from the fixing block 16; the second slot 17 can be used to fix the self-locking device 2, and the cancellous bone will grow into the inverted teeth 18, thereby improving the stability of the intervertebral fusion device.

[0039] like Figure 1 to Figure 4 As shown, the self-locking device 2 includes a first fixed end 21 and a second fixed end 22 arranged at one end of the first fixed end 21, the second fixed end 22 includes a first connecting plate 221 and a second connecting plate 222, a first clamping plate 23 and a second clamping plate 24 are arranged between the first connecting plate 221 and the second connecting plate 222; a third clamping plate 25 and a fourth clamping plate 26 are arranged on both sides above the first connecting plate 221 and the second connecting plate 222.

[0040] like Figure 3 As shown, a threaded hole 211 is provided in the middle of the first fixing end 21, and the threaded hole 211 passes through the second fixing end 22; Figure 3As shown, the first connecting plate 221 and the second connecting plate 222 are C-shaped, and their openings are arranged facing each other; a first fixing groove 223 is arranged between the first connecting plate 221 and the second connecting plate 222, the first connecting plate 221 and the second connecting plate 222 are arranged in the first fixing groove 223, and a first clip 27 is arranged at the end of the first clamping plate 23 and the end of the second clamping plate 24, the first clip 27 is connected to the first clamping plate 23 and the second clamping plate 24 in an arc shape, and a second clip 28 is arranged at the end of the third clamping plate 25 and the fourth clamping plate 26, and the second clip 28 is connected to the third clamping plate 25 and the fourth clamping plate 26 in an arc shape.

[0041] The self-locking device 2 is an integrated structure with a simple structure and small size, and is easy and quick to install. When it is implemented, the second fixed end 22 is first fitted with the intervertebral fusion device, and the first buckle 27 at the top of the first clamping plate 23 and the second clamping plate 24 is matched and fixed with the first clamping groove 15, which can prevent the self-locking device 2 from falling off from the intervertebral fusion device, and the second buckle 28 at the top of the third clamping plate 25 and the fourth clamping plate 26 is matched and fixed with the second clamping groove 17, which can effectively prevent the insertion rod 12 from falling out, and can make the insertion rod 12 have no protruding structure after assembly, so as to prevent the wear of the patient's soft tissue caused by the protrusion or falling of the insertion rod 12; after the self-locking device 2 is fixed, the threaded hole 211 will be aligned with the implantation hole 14; when installing the intervertebral fusion device 2 ... When inserting an intervertebral fusion device, a special insertion tool is installed through the threaded hole 211 of the first fixed end 21. After the intervertebral fusion device is installed in place, the special insertion tool is removed and the bone implantation tool is replaced. At this time, the threaded hole 211 serves as a bone grafting channel, and the implanted cancellous bone enters the intervertebral fusion device through the threaded hole 211, the hollow part of the second fixed end 22 and the implantation hole 14, and then bone fusion is performed through the porous structure on the surface of the intervertebral fusion device. The self-locking device 2 can improve the implantation stability of the intervertebral fusion device, avoid secondary damage to the patient caused by the intervertebral fusion device falling off or sliding, and improve the fusion efficiency of the intervertebral fusion device during bone implantation, effectively shorten the patient's treatment time, and improve the treatment efficiency.

[0042] In the embodiment of the utility model, the first clamping plate 23, the second clamping plate 24, the third clamping plate 25 and the fourth clamping plate 26 are all made of elastic material; the first clamping plate 23, the second clamping plate 24, the third clamping plate 25 and the fourth clamping plate 26 made of elastic material are conducive to the adjustment of the self-locking device 2 according to the intervertebral fusion device, thereby improving the applicability of the device.

[0043] In summary, the self-locking device for the intervertebral fusion device provided by the utility model has a simple structure, small size, and is easy and quick to install. It can not only ensure the bone fusion rate of the intervertebral fusion device, but also improve the bone implantation stability of the intervertebral fusion device, avoid secondary damage to the patient caused by the intervertebral fusion device falling off or sliding, thereby improving the treatment efficiency.

Claims

1. A self-locking device for an intervertebral fusion cage, characterized in that: It comprises an intervertebral fusion device body (1) and a self-locking device (2) connected to the intervertebral fusion device body (1); The intervertebral fusion device body (1) is a rectangular hollow structure, and its upper surface and lower surface are both provided with grooves (11), and an insertion rod (12) is arranged in the groove (11). The end of the insertion rod (12) is connected to the self-locking device (2), and the self-locking device (2) includes a first fixed end (21) and a second fixed end (22) arranged at one end of the first fixed end (21), and the second fixed end (22) includes a first connecting plate (221) and a second connecting plate (222), and a first clamping plate (23) and a second clamping plate (24) are arranged between the first connecting plate (221) and the second connecting plate (222); a third clamping plate (25) and a fourth clamping plate (26) are arranged on both sides above the first connecting plate (221) and the second connecting plate (222).

2. The self-locking device for intervertebral fusion cage according to claim 1, characterized in that: A threaded hole (211) is provided in the middle of the first fixed end (21), and the threaded hole (211) passes through the second fixed end (22).

3. The self-locking device for an intervertebral fusion cage according to claim 1, characterized in that: The first connecting plate (221) and the second connecting plate (222) are C-shaped, and their openings are arranged facing each other; a first fixing groove (223) is arranged between the first connecting plate (221) and the second connecting plate (222).

4. The self-locking device for intervertebral fusion cage according to claim 1, characterized in that: A first buckle (27) is disposed at the end of the first clamping plate (23) and the end of the second clamping plate (24), and the first buckle (27) is connected to the first clamping plate (23) and the second clamping plate (24) in an arc shape.

5. The self-locking device for intervertebral fusion cage according to claim 1, characterized in that: The third clamping plate (25) and the fourth clamping plate (26) are both provided with a second buckle (28) at their ends, and the second buckle (28) is connected to the third clamping plate (25) and the fourth clamping plate (26) in an arc shape.

6. The self-locking device for intervertebral fusion cage according to claim 1, characterized in that: The first clamping plate (23), the second clamping plate (24), the third clamping plate (25) and the fourth clamping plate (26) are all made of elastic material.

7. The self-locking device for an intervertebral fusion cage according to claim 1, characterized in that: A second fixing groove (13) is provided at one end of the intervertebral fusion device body (1), an implantation hole (14) is provided at the bottom end of the second fixing groove (13), and first clamping grooves (15) matching with the first buckle (27) are provided on both sides thereof.

8. The self-locking device for an intervertebral fusion cage according to claim 1, characterized in that: A fixing block (16) is provided at the end of the insertion rod (12), and a second clamping groove (17) is provided on the fixing block (16), and the second clamping groove (17) matches with the second buckle (28).

9. The self-locking device for an intervertebral fusion cage according to claim 1, characterized in that: An inverted tooth (18) is provided at one end of the insertion rod (12) away from the fixing block (16).

10. The self-locking device for an intervertebral fusion cage according to claim 9, characterized in that: The inverted teeth (18) are provided in 1-5 groups.

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