Intervertebral disc fusion device

Abstract

The utility model relates to an intervertebral disc fusion device which comprises a fusion cage and an adjusting mechanism. The fusion cage comprises an upper prosthesis and a lower prosthesis, two sets of lifting mechanisms are arranged between the upper prosthesis and the lower prosthesis, the two sets of lifting mechanisms are arranged at the two ends of the upper prosthesis and the two ends of the lower prosthesis respectively, and the adjusting mechanism is detachably connected with the adjusting ends of the two lifting mechanisms respectively. And filling holes are formed in the middle parts of the upper prosthesis and the lower prosthesis. The integrated fusion cage has the advantages that the lifting mechanisms are in a folded state before adjustment so as to facilitate implantation, the two sets of lifting mechanisms are independently adjusted through the adjusting mechanism, an included angle is formed between the upper prosthesis and the lower prosthesis so as to meet actual operation requirements, the defect that the height of an existing integrated fusion cage cannot be adjusted is overcome, and the fusion cage is convenient to use. And the adjustable fusion cage can only realize equal-height adjustment at two ends.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to an intervertebral disc fusion device. BACKGROUND

[0002] In spinal surgery, intervertebral fusion cage as an important medical instrument is widely used in intervertebral fusion surgery to repair bone defects, stabilize spinal structure and promote intervertebral fusion. However, the existing intervertebral fusion cage has certain limitations in design, which cannot meet the actual needs in clinical surgery.

[0003] At present, the common intervertebral fusion cage in the market is mainly divided into integral fixed non-adjustable type and upper and lower equal height adjustable type. Although these two types of intervertebral fusion cages solve the problem of intervertebral fusion to some extent, they have deficiencies in adapting to the physiological curve of human spine and the angle between vertebral bodies.

[0004] The integral fixed non-adjustable intervertebral fusion cage cannot be adjusted according to the needs of surgery or individual differences after implantation, which may cause mismatch between the implanted intervertebral fusion cage and the surrounding bone tissue, affecting the surgical effect and the recovery of patients. At the same time, due to the existence of the physiological curve of human spine, there is a certain angle between two vertebral bodies. This fixed non-adjustable design cannot adapt to these complex anatomical structures.

[0005] Although the upper and lower equal height adjustable intervertebral fusion cage can adjust the height to some extent to adapt to the intervertebral space height of different patients and facilitate folding for implantation, it still cannot adapt to the physiological curve of spine and the angle between vertebral bodies. CONTENT OF THE UTILITY MODEL

[0006] The technical problem to be solved by the utility model is to provide an intervertebral disc fusion device to overcome the deficiencies in the prior art.

[0007] The technical solution of the utility model to solve the above technical problem is as follows: an intervertebral disc fusion device, comprising a fusion cage and an adjusting mechanism; the fusion cage comprises an upper prosthesis and a lower prosthesis, two groups of lifting mechanisms are arranged between the upper prosthesis and the lower prosthesis, the two groups of lifting mechanisms are arranged at both ends of the upper prosthesis and the lower prosthesis respectively, and the adjusting mechanism is detachably connected with the adjusting ends of the two lifting mechanisms respectively; filling holes are formed in the middle of the upper prosthesis and the lower prosthesis.

[0008] The utility model has the beneficial effects that: before adjustment, the lifting mechanisms are in the folded state to facilitate implantation, the two groups of lifting mechanisms are independently adjusted by the adjusting mechanism, an angle is generated between the upper prosthesis and the lower prosthesis to adapt to the actual surgical needs, the defect that the existing integral fusion cage cannot adjust the height is solved, and the defect that the adjustable fusion cage can only adjust the height at both ends is solved.

[0009] On the basis of the above technical solutions, the utility model further can make improvement as follows.

[0010] Further, the lifting mechanism comprises a threaded sleeve, two screw rods, two upper connecting rods, two lower connecting rods, a top base and a bottom base, one end of each of the two upper connecting rods is rotatably connected to the top base, one end of each of the two lower connecting rods is rotatably connected to the bottom base, the other end of each of the upper connecting rods and the other end of each of the lower connecting rods on the same side are hingedly connected;

[0011] The hinged portions of the two lower connecting rods are rotatably provided with rotating sleeves, one end of each of the two screw rods is fixedly connected to the two rotating sleeves, the other end of each of the two screw rods is threadedly connected to the two ends of the threaded sleeve, the screw threads of the two screw rods are oppositely arranged, the screw threads in the two ends of the threaded sleeve are oppositely arranged, and a first gear is fixedly arranged in the middle of the threaded sleeve;

[0012] The front end of the adjusting mechanism is provided with a second gear, and the second gear is engaged with the first gear.

[0013] Further, the adjusting mechanism further comprises a protective tube, the second gear is arranged at the front end of the protective tube, and the second gear protrudes from the front end of the protective tube; the front end and the rear end of the protective tube are rotatably provided with belt pulleys, the two belt pulleys are driven by a belt, the belt pulley at the front end of the protective tube is coaxially connected with the rotating shaft of the second gear, and the rotating shaft of the belt pulley at the rear end of the protective tube is coaxially connected with a rotating wheel.

[0014] Further, the adjusting mechanism further comprises a handle connected to the rear end of the protective tube, and the rotating wheel is arranged on the outer side of the handle.

[0015] Further, the upper prosthesis and the lower prosthesis are both made of PEEK material.

[0016] Further, the upper end surface of the upper prosthesis and the lower end surface of the lower prosthesis are both provided with anti-skid teeth.

[0017] Further, an elastic blocking net is arranged between the two filling holes. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a structural schematic view of the utility model;

[0019] Fig. 2 It is a structural schematic view of the lifting mechanism of the utility model;

[0020] Fig. 3 It is an exploded structural schematic view of the utility model;

[0021] Fig. 4 It is a structural schematic view of the adjusting mechanism of the utility model;

[0022] Fig. 5This is a schematic cross-sectional view of the adjustment mechanism of this utility model;

[0023] Fig. 6 This is a schematic diagram of the barrier net structure of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Fusion device; 11. Upper prosthesis; 111. Rotating groove; 12. Lower prosthesis; 13. Lifting mechanism; 131. Threaded sleeve; 132. Screw; 133. Upper connecting rod; 134. Lower connecting rod; 135. Top seat; 1351. Rotating shaft; 136. Base; 137. Rotating sleeve; 138. First gear; 14. Filling hole; 15. Anti-slip teeth; 16. Barrier net; 2. Adjustment mechanism; 21. Second gear; 22. Protective tube; 23. Pulley; 24. Belt; 25. Actuating wheel; 26. Handle. Detailed Implementation

[0026] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] like Figs. 1-6 As shown in Embodiment 1, an intervertebral disc fusion device includes a fusion unit 1 and an adjustment mechanism 2. The fusion unit 1 includes an upper prosthesis 11 and a lower prosthesis 12. Two sets of lifting mechanisms 13 are provided between the upper prosthesis 11 and the lower prosthesis 12. The two sets of lifting mechanisms 13 are respectively provided at both ends of the upper prosthesis 11 and the lower prosthesis 12. The adjustment mechanism 2 is detachably connected to the adjustment ends of the two lifting mechanisms 13. A filling hole 14 is provided in the middle of the fusion unit 1.

[0028] Before adjustment, the lifting mechanism 13 is in the closed state to facilitate implantation. The two lifting mechanisms 13 are independently adjusted by the adjustment mechanism 2 to create an angle between the upper prosthesis 11 and the lower prosthesis 12 to meet the actual surgical needs. This solves the defects of the existing integrated fusion device 1, which cannot adjust the height, and the defects of the adjustable fusion device 1, which can only adjust the height of both ends.

[0029] In practice, the lifting mechanism 13 is made of titanium alloy.

[0030] Example 2 is a further improvement based on Example 1, and its details are as follows:

[0031] The lifting mechanism 13 comprises a threaded sleeve 131, two screw rods 132, two upper connecting rods 133, two lower connecting rods 134, a top base 135 and a bottom base 136; one end of each of the two upper connecting rods 133 is rotationally connected with the top base 135, and one end of each of the two lower connecting rods 134 is rotationally connected with the bottom base 136; the other end of the upper connecting rod 133 and the other end of the lower connecting rod 134 on the same side are hingedly connected;

[0032] The hinged connection of the lower connecting rod 134 on the two sides and the lower connecting rod 134 is rotationally provided with a rotating sleeve 137, one end of each of the two screw rods 132 is fixedly connected with the two rotating sleeves 137, the other end of each of the two screw rods 132 is threadedly connected with two ends of the threaded sleeve 131, the screw threads of the two screw rods 132 are oppositely arranged, the screw threads in the two ends of the threaded sleeve 131 are oppositely arranged, and a first gear 138 is fixedly sleeved in the middle of the threaded sleeve 131;

[0033] The front end of the adjusting mechanism 2 is provided with a second gear 21, and the second gear 21 is engaged with the first gear 138.

[0034] The second gear 21 at the front end of the adjusting mechanism 2 drives the first gear 138 to rotate, thereby driving the threaded sleeve 131 to rotate relative to the two screw rods 132, the two screw rods 132 are close to each other in the threaded sleeve 131, the lifting mechanism 13 is raised, the two screw rods 132 are away from each other in the threaded sleeve 131, the lifting mechanism 13 is lowered, thereby realizing height adjustment of the lifting mechanism 13, and further realizing independent adjustment of the heights of the two ends of the fusion device 1, and achieving the purpose of generating an included angle between the upper prosthesis 11 and the lower prosthesis 12.

[0035] In specific implementation, the lower end surface of each end of the upper prosthesis 11 is provided with a rotating groove 111, and the two sides of the top base 135 are provided with rotating shafts 1351, and the top base 135 rotates in the rotating groove 111 through the rotating shafts 1351 to offset the motion interference caused by different adjustment heights of the two adjusting mechanisms 2.

[0036] Embodiment 3 is a further improvement based on embodiment 1, and the specific implementation is as follows:

[0037] The adjusting mechanism 2 further comprises a protective tube 22, the second gear 21 is arranged at the front end of the protective tube 22, and the second gear 21 protrudes from the front end of the protective tube 22; a belt pulley 23 is rotationally arranged inside the front end and the rear end of the protective tube 22, the two belt pulleys 23 are driven by a belt 24, the belt pulley 23 at the front end of the protective tube 22 is coaxially connected with the rotating shaft of the second gear 21, and the rotating shaft of the belt pulley 23 at the rear end of the protective tube 22 is coaxially connected with a push wheel 25.

[0038] The rotation of the second gear 21 is realized by rotating the dial wheel 25 to drive the belt 24, and the belt 24 drives the second gear 21 to rotate, thereby externally driving the rotation of the second gear 21.

[0039] Embodiment 4, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0040] The adjusting mechanism 2 further comprises a handle 26 connected to the rear end of the protection tube 22, and a dial wheel 25 is arranged outside the handle 26. The handle 26 is arranged to facilitate holding during adjustment.

[0041] Embodiment 5, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0042] The upper prosthesis 11 and the lower prosthesis 12 are both made of PEEK material. PEEK material has excellent biocompatibility, reducing the risk of postoperative rejection reaction; it also has very high strength and stiffness, improving the stability of the fusion cage 1 after implantation.

[0043] Embodiment 6, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0044] The upper end surface of the upper prosthesis 11 and the lower end surface of the lower prosthesis 12 are both provided with anti-skid teeth 15. This avoids displacement of the fusion cage 1 after implantation.

[0045] Embodiment 7, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0046] An elastic opening and closing barrier net 16 is arranged between the two filling holes 14. This can prevent the bone particles filled in the filling hole 14 from overflowing.

[0047] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and those skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.

Claims

1. An intervertebral disc fusion device comprising: The application relates to a fusion device (1) and an adjusting mechanism (2); the fusion device (1) comprises an upper prosthesis (11) and a lower prosthesis (12), two groups of lifting mechanisms (13) are arranged between the upper prosthesis (11) and the lower prosthesis (12), the two groups of lifting mechanisms (13) are arranged at two ends of the upper prosthesis (11) and the lower prosthesis (12) respectively, and the adjusting mechanism (2) is detachably connected with adjusting ends of the two groups of lifting mechanisms (13); filling holes (14) are formed in the middle portions of the upper prosthesis (11) and the lower prosthesis (12).

2. The spinal disc fusion device of claim 1 wherein, The lifting mechanism (13) comprises a threaded sleeve (131), two screw rods (132), two upper connecting rods (133), two lower connecting rods (134), a top base (135) and a bottom base (136); one end of each of the two upper connecting rods (133) is rotationally connected with the top base (135), and one end of each of the two lower connecting rods (134) is rotationally connected with the bottom base (136); the other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; 3. An intervertebral disc fusion device in accordance with claim 2, wherein, The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; 4. An intervertebral disc fusion device in accordance with claim 3, wherein, The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; 5. The spinal disc fusion device as recited in claim 1, wherein, The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; 6. The spinal disc fusion device as recited in claim 1, wherein, The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; 7. The spinal disc fusion device as recited in claim 1, wherein, The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end of the lower connecting rod (134) on the same side are hingedly connected; The other end of the upper connecting rod (133) and the other end

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