Bionic movement intervertebral fusion replacement device

Abstract

The utility model discloses a bionic movement intervertebral fusion replacement device, and relates to the technical field of medical instruments. In order to solve the problem that an existing fusion cage does not move relatively and does not conform to normal physiological characteristics of human beings, the following technical scheme is provided: the fusion cage comprises an upper fusion body, a lower fusion body and a lining, the bottom of the upper fusion body is rotatably connected with the top of the lining, and the lining is detachably connected to the top of the lower fusion body. A groove is formed in the bottom of the upper fusion body, the shape of the groove is matched with the shape of the top of the lining, the top of the lining is of an arc-shaped structure, porous structures are arranged at the top of the upper fusion body and the bottom of the lower fusion body respectively, and barb structures are arranged at the top of the upper fusion body and the top of the lower fusion body. The side end of the lower fusion body is provided with a rotary outer blocking piece, and a bolt locking lining is arranged outside the rotary outer blocking piece. The defect that the fusion cage cannot move relatively can be overcome, normal physiological characteristics of human beings are better met, and meanwhile sufficient supporting force and bone ingrowth capacity are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a bionic motion intervertebral fusion replacement device. Background Art

[0002] Lumbar spine diseases, especially low back pain, lumbar muscle strain, lumbar disc herniation, etc., as multiple diseases that have long troubled humans, their incidence rate has increased significantly with the intensification of the global population aging trend, and has become a major problem seriously affecting human health and quality of life. The lumbar spine, as an important structure supporting the upper body, its health status is directly related to an individual's daily activity ability and quality of life.

[0003] In the field of the treatment of lumbar spine diseases, lumbar intervertebral fusion surgery has become a commonly used clinical method due to its advantages of effectively relieving chronic low back pain, treating disc diseases and spinal degenerative diseases. However, with the continuous progress of surgical techniques and the increase in the number of surgeries, the problem of postoperative intervertebral fusion cage subsidence has gradually emerged, attracting extensive attention in the medical field.

[0004] Intervertebral fusion cage subsidence, that is, the phenomenon of loss of intervertebral height caused by the fusion cage embedding into the endplate or cancellous bone, can lead to adverse consequences such as progressive spinal deformity, deterioration of nerve function and nonunion, seriously affecting the surgical effect and the prognosis of patients. Existing studies have shown that the occurrence of intervertebral fusion cage subsidence is closely related to a variety of risk factors, including the patient's own bone density, body weight, age and gender, the size, material and shape of the fusion cage, and factors such as endplate treatment and intervertebral space distraction during the operation.

[0005] In view of the complexity and importance of the problem of intervertebral fusion cage subsidence, in-depth research on it and exploration of effective prevention and intervention measures are of great significance for improving the success rate of lumbar intervertebral fusion surgery and the prognosis of patients. Content of the Utility Model

[0006] The purpose of the utility model is to provide a bionic motion intervertebral fusion replacement device to solve the problem that the existing fusion cages do not move relative to each other and do not conform to the normal physiological characteristics of humans.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] A bionic motion intervertebral fusion replacement device, which includes: an upper fusion body, a lower fusion body and a lining. The bottom of the upper fusion body is rotatably connected to the top of the lining, and the lining is detachably connected to the top of the lower fusion body.

[0009] The bottom of the upper fusion body is provided with a groove, and the shape of the groove is adapted to the shape of the top of the lining.

[0010] The shape of the top of the lining is an arc-shaped structure.

[0011] The top of the upper fusion body and the bottom of the lower fusion body are respectively provided with porous structures.

[0012] Barbed structures are provided at the top of the upper fusion body and the top of the lower fusion body.

[0013] A rotating outer baffle is provided at the side end of the lower fusion body, and a bolt is arranged outside the rotating outer baffle for locking the inner lining.

[0014] Grip holes are formed at both ends of the rotating outer baffle.

[0015] Clamping holes are symmetrically formed on one side of the upper fusion body.

[0016] The utility model has the following beneficial effects:

[0017] Bionic design improves the fusion effect: Through bionic design, the device simulates the motion characteristics and mechanical distribution of the natural intervertebral structure, which helps to promote the growth and healing of bone tissue during the fusion process and improve the success rate of intervertebral fusion.

[0018] Flexible detachable connection: The upper fusion body and the inner lining are rotationally connected, and at the same time, the inner lining is detachably connected to the lower fusion body. This design not only facilitates the installation and adjustment during the operation, but also facilitates the postoperative review or replacement when necessary, improving the flexibility and maintainability of the treatment.

[0019] Structural design with strong adaptability: The groove at the bottom of the upper fusion body is adapted to the arc-shaped structure at the top of the inner lining. This design ensures the tightness and stability of the connection part, which is beneficial to reducing the risk of postoperative loosening or displacement.

[0020] Porous structure promoting bone fusion: The porous structure design of the upper fusion body and the lower fusion body is beneficial to the growth and penetration of bone tissue, increases the contact area between the fusion body and the surrounding bone mass, accelerates the bone fusion process, and improves the fusion effect.

[0021] Barbed structure enhancing the fixation effect: The barbed structures at the top of the upper fusion body and the lower fusion body can increase the contact friction with the surrounding tissues, prevent the device from shifting after the operation, and improve the stability and reliability of the fixation.

[0022] Convenient locking and adjustment mechanism: The design of the rotating outer baffle and the bolt at the side end of the lower fusion body makes the locking and unlocking of the inner lining simple and fast. At the same time, it also provides the possibility for doctors to make fine adjustments during the operation, improving the accuracy and success rate of the operation.

[0023] Humanized operation design: The design of the grip holes on the rotating outer baffle and the clamping holes on the side of the upper fusion body enables doctors to conveniently operate and fix the device during the operation, reducing the operation difficulty and time, and improving the operation efficiency. Brief Description of the Drawings

[0024] Figure 1 It is a three-dimensional structural diagram of a bionic motion intervertebral fusion replacement device of the present utility model;

[0025] Figure 2 It is a three-dimensional structural diagram of the upper fusion body;

[0026] Figure 3 It is a three-dimensional structural diagram of the lower fusion body and the inner liner;

[0027] Figure 4 It is a three-dimensional structural diagram of the lower fusion body;

[0028] Figure 5 It is a three-dimensional structural diagram of the porous structure;

[0029] Figures 1 to 5 The reference numerals shown in the figure are respectively represented as: upper fusion body 1, first groove 11, clamping hole 12, lower fusion body 2, holding hole 21, second groove 22, inner liner 3, porous structure 4, top groove 41, bottom groove 42, barbed structure 5, rotating outer baffle 6. Detailed Description of the Preferred Embodiments

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figure 1 , the present utility model provides a bionic motion intervertebral fusion replacement device, and its specific implementation is as follows:

[0032] The device mainly consists of three parts: an upper fusion body 1, a lower fusion body 2, and an inner liner 3. All three parts are made of medical metal materials with good biocompatibility, such as titanium alloy (Ti6Al4V) or cobalt-chromium-molybdenum alloy, to ensure the safety and stability of long-term implantation in the body.

[0033] Structure of the upper fusion body 1:

[0034] As Figure 2 , Figure 5 shown, the upper fusion body 1 is designed as a disc-shaped structure with a certain thickness, and its top is flat and provided with a porous structure 4. The porous structure 4 is formed by laser drilling technology, and the pore size and distribution are optimized according to the growth requirements of bone tissue to promote the growth and fusion of bone cells. A top groove 41 is opened at the top of the porous structure 4, and bottom grooves 42 are symmetrically opened at the bottom of the porous structure 4.

[0035] A groove 11 is provided at the center of the bottom of the upper fusion body 1 , and the shape of the groove 11 is completely compatible with the arc-shaped structure at the top of the liner 3 to ensure tightness and stability when the two are rotated and connected.

[0036] Two clamping holes 12 are symmetrically provided on one side of the upper fusion body 1 for clamping by instruments during surgery, so as to facilitate installation and positioning of the device.

[0037] Structure of lining 3:

[0038] The liner 3 is designed as a cylindrical component with an arc-shaped top, and its arc-shaped top is tightly matched with the groove 11 of the upper fusion body 1 to achieve a rotational connection. This design allows the upper fusion body 1 to rotate relative to the liner 3 within a certain range, simulating the motion characteristics of natural intervertebral discs.

[0039] The side wall of the liner 3 is smooth, which is convenient for connection and removal with the lower fusion body 2. The bottom thereof is designed with an interface adapted to the top of the lower fusion body 2, and is connected to the lower fusion body 2 by bolts or other locking mechanisms.

[0040] like Figures 3 - 4 As shown, the structure of the lower fusion body 2:

[0041] The lower fusion body 2 is also designed as a disc-shaped structure, the bottom of which is flat and provided with a porous structure 4, which corresponds to the porous structure on the top of the upper fusion body 1, and jointly promotes bone fusion.

[0042] The top edge of the lower fusion body 2 is provided with a barb structure 5 to increase the contact friction with the surrounding bone tissue and prevent the device from shifting after surgery.

[0043] A rotating outer baffle 6 is provided at the side end of the lower fusion body 2. The rotating outer baffle 6 is connected to the lower fusion body 2 through an axle pin and can be rotated around the axle pin to lock or release the liner 3. Bolt holes are provided on the outer side of the rotating outer baffle 6, and the liner 3 can be firmly locked on the lower fusion body 2 by tightening the bolts. Specifically, the rotating outer baffle 6 reaches the 90° position to lock the liner 3, and then the screw is rotated to lock it.

[0044] The two ends of the rotating outer blocking piece 6 are provided with holding holes 21, so as to facilitate the holding, rotation and locking operations by instruments during the operation.

[0045] Assembly and use instructions:

[0046] During the operation, the upper fusion body 1 and the lower fusion body 2 without the liner 3 are first placed into the intervertebral disc, and the fusion bodies are expanded using a holding rod.

[0047] Then, the liner 3 is pushed into the top of the lower fusion body 2 .

[0048] Finally, by rotating the outer baffle 6 to 90° and tightening the bolts, the inner liner 3 is completely locked onto the lower fusion body 2.

[0049] Through the above specific implementation manners, the bionic motion intervertebral fusion replacement device provided by the present utility model can achieve stable connection and flexible rotation among the upper fusion body, the lower fusion body and the inner liner, and at the same time has good biocompatibility and bone fusion effect, providing a new solution for spinal surgery.

[0050] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A bionic motion intervertebral fusion replacement device, characterized in that: include: An upper fusion body (1), a lower fusion body (2) and an inner lining (3), wherein the bottom of the upper fusion body (1) is rotatably connected to the top of the inner lining (3), and the inner lining (3) is detachably connected to the top of the lower fusion body (2).

2. The bionic motion intervertebral fusion replacement device according to claim 1, characterized in that: The bottom of the upper fusion body (1) is provided with a groove (11), and the shape of the groove (11) is adapted to the shape of the top of the liner (3).

3. The bionic motion intervertebral fusion replacement device according to claim 1, characterized in that: The top of the lining (3) is in the shape of an arc structure.

4. The bionic motion intervertebral fusion replacement device according to claim 1, characterized in that: The top of the upper fusion body (1) and the bottom of the lower fusion body (2) are respectively provided with a porous structure (4).

5. The bionic motion intervertebral fusion replacement device according to claim 1, characterized in that: The top of the upper fusion body (1) and the top of the lower fusion body (2) are provided with barb structures (5).

6. The bionic motion intervertebral fusion replacement device according to claim 1, characterized in that: A rotating outer baffle (6) is provided at the side end of the lower fusion body (2), and bolts are provided outside the rotating outer baffle (6) for locking the inner lining (3).

7. The bionic motion intervertebral fusion replacement device according to claim 6, characterized in that: Holding holes (21) are formed at two ends of the rotating outer blocking piece (6).

8. The bionic motion intervertebral fusion replacement device according to claim 1, characterized in that: A clamping hole (12) is symmetrically provided on one side of the upper fusion body (1).

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