Fusion cage, fusion cage installation accessory and cervical vertebra operation assembly

Abstract

The invention provides a fusion cage, a fusion cage installation accessory and a cervical vertebra operation assembly, and relates to the technical field of medical instruments.The fusion cage comprises an implant, a lock pin and an implant nail, the implant is provided with a window penetrating through the upper surface and the lower surface of the implant, and the rear wall of the implant is provided with an implant hole and a lock hole which are communicated with the window; the implanting nail is used for being connected with the implanting hole; the head end of the lock nail is provided with a nail cap, the tail end of the lock nail is connected with an elastic arm, one end of the elastic arm is connected with the lock nail, and the outer side wall of the other end of the elastic arm is provided with a clamping jaw protruding towards the circumferential outer side; the lock pin can rotate relative to the lock hole and slide in the axial direction. The lock nail has a non-working state and a working state, in the non-working state, the clamping jaw is extruded in the lock hole, and the projection of the nail cap towards the rear wall of the implant in the axial direction of the lock nail is completely staggered from the implant hole; in the working state, the clamping jaw is located in the window and connected with the inner wall of the window in a clamped mode, and at least part of the projection, facing the rear wall of the implant, of the nail cap in the axial direction of the lock nail is overlapped with the implant hole.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a fusion device, fusion device mounting accessories and a cervical spine surgery component. Background Art

[0002] At present, in some anterior cervical fusion surgeries, doctors often need to implant a titanium plate in the anterior approach after implanting the fusion device for fixation. The notch produced by the titanium plate in the anterior approach can easily cause adverse consequences such as postoperative dysphagia and even adjacent segment degeneration. Doctors and patients are in urgent need of an implant with a smaller notch and more safety to improve this situation. Summary of the invention

[0003] The purpose of the present invention is to provide a fusion device, a fusion device mounting accessory and a cervical spine surgery assembly to alleviate the technical problem that the existing implanter needs to be additionally implanted with a titanium plate for fixation.

[0004] In a first aspect, the present invention provides a fusion device, comprising: an implant, a locking nail and an implant nail, wherein the implant has a window penetrating through the upper and lower surfaces thereof, and the rear wall of the implant is provided with an implant hole and a locking hole communicating with the window;

[0005] The implant nail is used to connect with the implant hole;

[0006] The head end of the locking nail has a nail cap, the tail end of the locking nail is connected to an elastic arm, one end of the elastic arm is connected to the locking nail, and the outer side wall of the other end is provided with a claw protruding outward in the circumferential direction; the locking nail can rotate relative to the locking hole and slide axially;

[0007] The locking nail has an inoperative state and an operative state. In the inoperative state, the claw is squeezed in the locking hole, and the projection of the nail cap along the axial direction of the locking nail toward the rear wall of the implant is completely offset from the implant hole, so that the implant nail can enter the implant hole from back to front; in the operative state, the claw is located in the window and is engaged with the inner wall of the window, and the projection of the nail cap along the axial direction of the locking nail toward the rear wall of the implant at least partially overlaps with the implant hole, so as to prevent the implant nail in the implant hole from retreating.

[0008] Furthermore, the number of implantation holes and implantation pins on the implant is at least two, and they correspond one to one.

[0009] Furthermore, the axes of at least two implantation holes are not parallel.

[0010] Furthermore, there are at least two implantation holes respectively located on opposite sides of the keyhole, and from back to front, the two implantation holes located at the keyhole are inclined toward one side of the keyhole.

[0011] Furthermore, a forward recessed slot is provided on the rear wall of the implant, and the slot is used to accommodate the nail cap in a working state and prevent the nail cap from rotating.

[0012] Furthermore, the implant nail is threadedly connected to the implant hole, and in the working state, the clamping claw is located between two adjacent threads on the side wall of the implant nail.

[0013] Furthermore, a hexalobular groove is provided on the rear end surface of the implant pin, and a threaded hole concentric with the implant pin is provided inside the hexalobular groove.

[0014] In a second aspect, the present invention provides a fusion device installation accessory, which is used to install the above-mentioned fusion device, and the fusion device installation accessory is used to thread the implant pin and the implant hole, and the fusion device installation accessory includes an outer tube and an inner rod, the inner rod is threadedly connected to the outer tube, the inner rod is located on the inner side of the outer tube, and the inner rod is concentric with the outer tube;

[0015] The distal end of the inner rod is provided with a first stud, and the outer side wall of the distal end of the outer tube is provided with a plum blossom structure.

[0016] Furthermore, the proximal end of the outer tube is connected to a fixing frame, and the proximal end of the fixing frame is connected to a handle;

[0017] The proximal end of the inner rod is connected with a first nut, and the first nut is located in the fixing frame.

[0018] In the third aspect, the present invention provides a fusion device mounting accessory for installing the above-mentioned fusion device, the fusion device mounting accessory is used to clamp the implant, the fusion device mounting accessory includes a second nut, a hinged first clamping arm and a second clamping arm, the tail end of the first clamping arm is provided with a second screw threadedly connected to the second nut, the second nut is provided with a limiting hole concentric with its own screw hole on a side facing the first clamping arm, and the limiting hole is used to accommodate the tail end of the second clamping arm.

[0019] In a fourth aspect, the present invention provides a cervical spine surgical assembly comprising the above-mentioned fusion device and the above-mentioned fusion device mounting accessories.

[0020] The present invention has at least the following advantages or beneficial effects:

[0021] The fusion device provided by the present invention comprises: an implant, a locking nail and an implant nail, wherein the implant has a window penetrating the upper and lower surfaces thereof, and the rear wall of the implant is provided with an implant hole and a locking hole communicating with the window; the implant nail is used to be connected with the implant hole; the head end of the locking nail has a nail cap, and the tail end of the locking nail is connected with an elastic arm, one end of the elastic arm is connected with the locking nail, and the outer side wall of the other end is provided with a claw protruding outward in the circumferential direction; the locking nail can rotate relative to the locking hole and slide axially; the locking nail has an inoperative state and an inoperative state, in the inoperative state, the claw is squeezed into the locking hole, and the projection of the nail cap along the axial direction of the locking nail toward the rear wall of the implant is completely staggered with the implant hole, so that the implant nail can enter the implant hole from back to front; in the inoperative state, the claw is located in the window and is clamped with the inner wall of the window, and the projection of the nail cap along the axial direction of the locking nail toward the rear wall of the implant at least partially overlaps with the implant hole, so as to prevent the implant nail in the implant hole from retreating.

[0022] Before the operation, the locking nail is located in the locking hole of the implant and is in a non-working state, and the implant nail is separated from the implant. The operator can use a clamp to clamp the rear end of the implant and implant it into the body from back to front. Then, remove the clamp, use the nail applicator to pick up the implant nail, and insert the implant nail into the implant hole, and the rear end of the implant nail exceeds the nail cap. Rotate and push the locking nail forward, so that the locking nail is switched to the working state, the claw on the locking nail extends from the port in the locking hole, and the elastic arm rebounds from the squeezed state to the circumferential outside to the natural state, the claw moves to the inner wall of the window and engages with it, thereby preventing the locking nail from retreating. At the same time, the rotated nail cap stops at the rear side of the implant nail, and stops and limits the implant nail, thereby preventing the implant nail from retreating. The fusion device in this embodiment does not need to be fixed with an additional titanium plate, and no additional notch is generated, which reduces the incidence of postoperative dysphagia and the incidence of adjacent segment degeneration. It is simple and convenient to operate, shortens the operation time, and is conducive to better recovery of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of an implant of a fusion device provided by an embodiment of the present invention;

[0025] Figure 2 A rear view of an implant of a fusion device provided by an embodiment of the present invention;

[0026] Figure 3 for Figure 2 Sectional view along the A-A direction;

[0027] Figure 4 A schematic diagram of a locking pin of a fusion device provided in an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of a fusion device after implantation provided by an embodiment of the present invention;

[0029] Figure 6 A side view of an implant nail of a fusion device provided in an embodiment of the present invention;

[0030] Figure 7 A rear view of an implant nail of a fusion device provided in an embodiment of the present invention;

[0031] Figure 8 A cross-sectional view of an implant nail of a fusion device provided in an embodiment of the present invention;

[0032] Fig. 9 A schematic diagram of a holder for a fusion device installation accessory provided by an embodiment of the present invention;

[0033] Fig.10 A schematic diagram of a nailer for a fusion device installation accessory provided by an embodiment of the present invention;

[0034] Fig.11 A cross-sectional view of a nailer of a fusion device installation accessory provided by an embodiment of the present invention;

[0035] Fig.12 A schematic diagram of an open cone of a fusion device installation accessory provided in an embodiment of the present invention;

[0036] Fig.13 A schematic diagram of a nail locker of a fusion device installation accessory provided in an embodiment of the present invention.

[0037] Icons: 1-implant; 11-window; 12-implant hole; 13-locking hole; 14-slot; 15-clamping slot; 2-locking nail; 21-nail cap; 22-elastic arm; 23-claw; 3-implant nail; 31-hexagonal slot; 32-threaded hole; 41-outer tube; 42-inner rod; 43-first stud; 45-fixing frame; 44-first nut; 51-second nut; 511-limiting hole; 52-first clamping arm; 53-second clamping arm; 6-opening cone; 7-nail lock. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] like Figure 1 - Fig.13As shown, the fusion device provided by the present invention comprises: an implant 1, a locking nail 2 and an implant nail 3.

[0045] The implant 1 and the locking nail 2 are in a connected state, and the implant nail 3 and the implant 1 are separately provided.

[0046] The implant 1 has windows 11 penetrating the upper and lower surfaces thereof. The shape of the implant 1 is generally a “U”-shaped structure, and the upper and lower surfaces thereof have tooth structures to increase friction.

[0047] An implant hole 12 and a lock hole 13 connected to the window 11 are provided on the rear wall of the implant 1. In the present embodiment, there are two implant holes 12, which are respectively located on the left and right sides of the lock hole 13. In other feasible schemes, the number of implant holes 12 may be more, such as three or four, and the number of implant holes 12 is the same as the number of implant pins 3, and corresponds one to one.

[0048] The implant nail 3 is used to be connected to the implant hole 12. In this embodiment, a threaded connection is adopted. The outer wall of the nail rod of the implant nail 3 is provided with an external thread, and the inner wall of the implant hole 12 is correspondingly provided with an internal thread.

[0049] like Figure 3 and Figure 4 As shown, the head end of the locking nail 2 has a nail cap 21, and the cross-sectional shape of the nail cap 21 is roughly elliptical. The tail end of the locking nail 2 is connected to an elastic arm 22. The number of the elastic arms 22 can be two, and the two elastic arms 22 are arranged at intervals. One end of the elastic arm 22 is connected to the locking nail 2, and the outer side wall of the other end is provided with a claw 23 protruding outward in the circumferential direction. The claws 23 of the two elastic arms 22 protrude in opposite directions, thereby improving the stability of the clamping.

[0050] like Figure 5 As shown, the locking nail 2 can rotate relative to the locking hole 13 and slide axially, so that the locking nail 2 is switched from the non-working state to the working state. In the non-working state, the claw 23 is squeezed into the locking hole 13, the top of the claw 23 abuts against the inner wall of the locking hole 13, the elastic arm 22 is also compressed, and the two elastic arms 22 are close to each other, and both have a tendency to move in a direction away from each other. The projection of the nail cap 21 along the axial direction of the locking nail 2 toward the rear wall of the implant 1 is completely staggered with the implant hole 12, so that the implant nail 3 can enter the implant hole 12 from the back to the front, avoiding interference with the implant nail 3. In the working state, the claw 23 is located in the window 11 and is engaged with the inner wall of the window 11, and the projection of the nail cap 21 along the axial direction of the locking nail 2 toward the rear wall of the implant 1 at least partially overlaps with the implant hole 12, so as to prevent the implant nail 3 in the implant hole 12 from retreating.

[0051] Before the operation, the locking nail 2 is located in the locking hole 13 of the implant 1 and is in a non-working state, and the implant nail 3 is separated from the implant 1. The surgeon can use a clamp to clamp the rear end of the implant 1 and implant it into the body from the back to the front. Then, remove the clamp, use the nail applicator to pick up the implant nail 3, and insert the implant nail 3 into the implant hole 12, and the rear end of the implant nail 3 exceeds the nail cap 21. Rotate and push the locking nail 2 forward, so that the locking nail 2 switches to the working state, the claw 23 on the locking nail 2 extends from the inner port of the locking hole 13, and the elastic arm 22 rebounds from the squeezed state to the circumferential outer side to the natural state, and the claw 23 moves to the inner side wall of the window 11 and engages with it, thereby preventing the locking nail 2 from retreating. At the same time, the rotated nail cap 21 stops at the rear side of the implant nail 3, and stops and limits the implant nail 3, thereby preventing the implant nail 3 from retreating. The fusion device in this embodiment does not require additional titanium plate implantation for fixation, and no additional notches are produced, which reduces the incidence of postoperative dysphagia and the incidence of adjacent segment degeneration. It is also simple and convenient to operate, shortens the operation time, and facilitates better recovery for patients.

[0052] In this embodiment, one of the two implantation pins 3 located on the left and right sides of the locking hole 13 is tilted upwards and the other is tilted downwards. Moreover, from back to front, the two implantation holes 12 are tilted toward one side of the locking hole 13, forming a cohesive shape, thereby increasing the connection stability between the implantation pins 3 and the implant 1 and the human body.

[0053] A forward recessed slot 14 is provided on the rear wall of the implant 1 , and the slot 14 is used to accommodate the nail cap 21 in a working state and prevent the nail cap 21 from rotating.

[0054] like Figure 2 As shown, when the locking nail 2 is in a non-working state, the front wall of the nail cap 21 abuts against the rear end surface of the slot 14, and the user needs to rotate the locking nail 2 first until the nail cap 21 is aligned with the slot 14 before pushing the locking nail 2 forward, thereby avoiding the problem of accidentally firing the locking nail 2. In addition, the nail cap 21 that has entered the slot 14 cannot rotate due to the stopper of the inner wall of the slot 14, and the locking nail 2 is completely fixed to the implant 1.

[0055] The implant nail 3 is threadedly connected to the implant hole 12 , and in the working state, the clamping claw 23 is located between two adjacent threads on the side wall of the implant nail 3 .

[0056] The locking hole 13 and the implantation hole 12 are close together, and the claw 23 thereof has a sufficient length. After the claw 23 extends out from the locking hole 13, the claw 23 can be ejected into the groove formed by two adjacent threads of the implantation nail 3, thereby acting as a stopper for the threads. The nail cap 21 stops the rear end of the implantation nail 3, and the claw 23 is engaged with the threads on the implantation nail 3 while being engaged with the implant 1, thereby making the connection stability among the implant 1, the locking nail 2, and the implantation nail 3 stronger.

[0057] like Figure 6 - Figure 8 As shown, a hexalobular groove 31 is provided on the rear end surface of the implant nail 3 , and a threaded hole 32 concentric with the implant nail 3 is provided inside the hexalobular groove 31 .

[0058] like Fig.10 and Fig.11 As shown, the fusion device installation accessories used to install the fusion zone may include a nailing device, which is used to connect with the implant nail 3 and thread the implant nail 3 with the implant hole 12. The nailing device includes an outer tube 41 and an inner rod 42, the inner rod 42 is threadedly connected to the outer tube 41, the inner rod 42 is located on the inner side of the outer tube 41, and the inner rod 42 is concentric with the outer tube 41; the distal end of the inner rod 42 has a first stud 43, and the outer side wall of the distal end of the outer tube 41 is provided with a plum blossom structure, and by rotating the inner rod 42, the first stud 43 at the distal end of the inner rod 42 can be extended from the distal end of the outer tube 41 or retracted into the inner side of the outer tube 41. The proximal end of the outer tube 41 is connected to a fixed frame 45, the outer tube 41 is fixedly connected to the fixed frame 45, and the proximal end of the fixed frame 45 is fixedly connected to a handle for the operator to hold. The proximal end of the inner rod 42 is connected with a first nut 44 , and the first nut 44 is located in the fixing frame 45 . By rotating the first nut 44 , the inner rod 42 can be driven to rotate, so as to control the rotation and extension of the first screw rod.

[0059] When in use, the plum blossom structure at the distal end of the outer tube 41 can be docked with the plum blossom groove 31 on the rear end face of the implant nail 3, and then the first nut 44 can be rotated to screw the first screw into the threaded hole 32 inside the plum blossom groove 31 to hold the screw firmly and prevent the screw from falling off the screwdriver and into the patient's body during the operation. Then the implant nail 3 is screwed into the implant hole 12, and the first nut 44 is rotated in the opposite direction to remove the nail setter from the implant nail 3.

[0060] like Fig. 9 As shown, the fusion device installation accessories used to install the fusion zone may include a clamp, which is used to clamp the implant 1. The fusion device installation accessories include a second nut 51, a hinged first clamping arm 52 and a second clamping arm 53. The tail end of the first clamping arm 52 is provided with a second screw threadedly connected to the second nut 51, and the second nut 51 is provided with a limiting hole 511 concentric with its own screw hole on the side facing the first clamping arm 52, and the limiting hole 511 is used to accommodate the tail end of the second clamping arm.

[0061] The hinged first clamping arm 52 and the second clamping arm 53 form a structure similar to a pair of pliers. The implant 1 has two clamping grooves 15. The distal ends of the first clamping arm 52 and the second clamping arm 53 are clamped in the two clamping grooves 15 respectively to improve the stability of clamping. The surgeon clamps the implant 1 with the clamp, and then rotates the second nut 51 to move the second nut 51 toward the distal end. The limiting hole 511 on the second nut 51 gradually covers the proximal end of the second clamping arm 53, thereby limiting the second clamping arm 53 and preventing the first clamping arm 52 and the second clamping arm 53 from opening, so that the clamping of the implant 1 is more stable. After the implantation of the implant 1 is completed, the second nut 51 is rotated in the opposite direction to release the restriction on the second clamping arm 53.

[0062] like Fig.12 As shown, the fusion device installation accessories used to install the fusion zone may include an open cone 6. Before the implant nail 3 is implanted, the open cone 6 can be used to pierce the cortex to prepare the nail path before inserting the nail.

[0063] like Fig.13 As shown, the fusion device installation accessories for installing the fusion zone may include a nail locker 7, which is used to connect with the nail locker 2 to drive the nail locker 2 to rotate and advance. The locked top cap has a slot, and the distal end of the nail locker 7 has a characteristic structure corresponding to the slot.

[0064] The cervical spine surgical assembly provided by the present invention comprises the above-mentioned fusion device and the above-mentioned fusion device installation accessories.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fusion device, characterized in that: include: An implant (1), a locking nail (2) and an implant nail (3), wherein the implant (1) has a window (11) penetrating the upper and lower surfaces thereof, and the rear wall of the implant (1) is provided with an implant hole (12) and a locking hole (13) communicating with the window (11); The implant nail (3) is used to be connected to the implant hole (12); The head end of the locking nail (2) has a nail cap (21), the tail end of the locking nail (2) is connected to an elastic arm (22), one end of the elastic arm (22) is connected to the locking nail (2), and the outer side wall of the other end is provided with a claw (23) protruding outward in the circumferential direction; the locking nail (2) can rotate relative to the locking hole (13) and slide along the axial direction; The locking nail (2) has an inoperative state and an operative state. In the inoperative state, the clamping claw (23) is squeezed into the locking hole (13), and the projection of the nail cap (21) along the axial direction of the locking nail (2) toward the rear wall of the implant (1) is completely offset from the implant hole (12), so that the implant nail (3) can enter the implant hole (12) from the back to the front; in the operative state, the clamping claw (23) is located in the window (11) and is engaged with the inner wall of the window (11), and the projection of the nail cap (21) along the axial direction of the locking nail (2) toward the rear wall of the implant (1) at least partially overlaps with the implant hole (12), so as to prevent the implant nail (3) in the implant hole (12) from retreating.

2. The fusion device according to claim 1, characterized in that: The number of the implant holes (12) and the number of the implant pins (3) on the implant (1) are at least two and correspond one to one.

3. The fusion device according to claim 2, characterized in that: There are at least two implantation holes (12) respectively located on opposite sides of the locking hole (13), and from back to front, the two implantation holes (12) located on the locking hole (13) are both inclined toward one side of the locking hole (13).

4. The fusion device according to claim 1, characterized in that: A forward recessed slot (14) is provided on the rear wall of the implant (1), and the slot (14) is used to accommodate a nail cap (21) in a working state and prevent the nail cap (21) from rotating.

5. The fusion device according to claim 4, characterized in that: The implant nail (3) is threadedly connected to the implant hole (12); in the working state, the clamping claw (23) is located between two adjacent threads on the side wall of the implant nail (3).

6. The fusion device according to any one of claims 1 to 5, characterized in that: The rear end surface of the implant pin (3) is provided with a hexalobular groove (31), and the interior of the hexalobular groove (31) is provided with a threaded hole (32) which is concentric with the implant pin (3).

7. A fusion device installation accessory, characterized in that: Used to install the fusion device according to claim 6, the fusion device installation accessory is used to thread the implant pin (3) with the implant hole (12), the fusion device installation accessory comprises an outer tube (41) and an inner rod (42), the inner rod (42) is threadedly connected to the outer tube (41), the inner rod (42) is located on the inner side of the outer tube (41), and the inner rod (42) is concentric with the outer tube (41); The distal end of the inner rod (42) is provided with a first stud (43), and the distal end of the outer tube (41) is provided with a plum blossom structure on its outer side wall.

8. The fusion device installation accessory according to claim 7, characterized in that: The proximal end of the outer tube (41) is connected to a fixing frame (45), and the proximal end of the fixing frame (45) is connected to a handle; The proximal end of the inner rod (42) is connected to a first nut (44), and the first nut (44) is located in the fixing frame (45).

9. A fusion device installation accessory, characterized in that: Used to install the fusion device according to any one of claims 1 to 6, the fusion device mounting accessories are used to clamp the implant (1), the fusion device mounting accessories include a second nut (51), a hinged first clamping arm (52) and a second clamping arm (53), the tail end of the first clamping arm (52) is provided with a second screw threadedly connected to the second nut (51), and the second nut (51) is provided with a limiting hole (511) concentric with its own screw hole on a side facing the first clamping arm (52), and the limiting hole (511) is used to accommodate the tail end of the second clamping arm.

10. A cervical spine surgical assembly, characterized in that: It comprises the fusion device as described in any one of claims 1 to 6, and the fusion device mounting accessories as described in any one of claims 7 to 9.

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