An adjustable bone graft space fusion device

Abstract

The present invention relates to the field of medical devices, and specifically to an adjustable bone grafting spacer, which includes a fixed seat, a kinematic pair, and a pin screw. The fixed seat is formed by mortising a swivel arm support and a chute base through a vertical tenon pin. The kinematic pair consists of a main swivel arm, a lateral tenon pin, a secondary swivel arm, a coupling shaft, and a sliding arm. A cylindrical boss preset at one end of the main swivel arm is assembled with clearance into the main arm mounting hole opened in the swivel arm support. The other end is mortised and connected to the secondary swivel arm through a lateral tenon pin. The coupling shaft is riveted and fixed to the other end of the secondary swivel arm. The sliding arm enclosed at this end of the secondary swivel arm is mounted on the coupling shaft. A ball head slide preset at the other end of the sliding arm is mounted in a runway-shaped groove under the chute base. The pin screw is screwed into the pin screw hole opened on the left side of the swivel arm support, and the top end of the pin screw is inserted into a locking blind hole I or a locking blind hole II opened on the left side of the main swivel arm, so as to lock the kinematic pair rotated to different positions, generate bone grafting bins of different sizes, and achieve the effect of treating patients with different degrees of intervertebral disc injuries.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and specifically to an adjustable bone grafting space fusion device. Background Art

[0002] With the aggravation of population aging, spinal degenerative diseases mainly manifested by neck and shoulder pain and low back and leg pain are seriously affecting people's work and life. Vertebral fusion surgery between vertebral bodies is one of the main methods for treating spinal degenerative diseases at present. As an orthopedic implantable medical device, an intervertebral fusion cage is one of the main implants for achieving fusion of adjacent vertebral spaces in the spine, and its safety and effectiveness directly affect the effect of bony fusion of adjacent vertebral bodies.

[0003] Traditional fusion cages made of PEEK material have poor imaging ability. Although titanium alloy components with stronger imaging ability are also added, due to the small size of the titanium alloy components, the imaging ability of the fusion cage is still poor, which is not conducive to the positioning of the fusion cage during surgery and increases the surgical difficulty. Fusion cages made of titanium alloy material are impervious to X-rays, which is not conducive to evaluating the formation of new bone inside and outside the fusion cage through imaging methods. Most traditional fusion cages are of an integral structure, which is not conducive to dealing with patients with different degrees of intervertebral disc injury. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustable bone grafting space fusion device to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An adjustable bone grafting space fusion device, comprising: a fixed seat, a kinematic pair, and a plug screw. The fixed seat includes a chute base, a vertical tenon pin, and a swivel arm support. The chute base is composed of a runway-shaped groove and a base tenon head. The kinematic pair includes a sliding arm, a connecting shaft, a secondary swivel arm, a lateral tenon pin, and a primary swivel arm. The ball head slide of the upper right end of the sliding arm is installed inside the runway-shaped groove. The sliding arm tenon head opened at the left end of the sliding arm is fitted and installed with the secondary arm U-shaped groove opened at the right end of the secondary swivel arm. A sliding arm tenon pin hole is opened on the sliding arm tenon head, and the sliding arm tenon pin hole is installed with a clearance in the middle of the connecting shaft. Both ends of the connecting shaft are riveted to the secondary arm groove pin holes at the upper and lower parts of the secondary arm U-shaped groove. A secondary arm tenon head is opened at the left end of the secondary swivel arm, and a secondary arm tenon pin hole is opened on the secondary arm tenon head. After the secondary arm tenon head is installed in the primary arm U-shaped groove opened at the right end of the primary swivel arm, it is riveted through the lateral tenon pin. A cylindrical boss is provided at the upper left end of the primary swivel arm, and the cylindrical boss is installed in the primary arm mounting hole opened at the lower right of the swivel arm support. The cylindrical boss and the primary arm mounting hole are in clearance fit. The plug screw is composed of a top nut, a middle screw, and a bottom smooth rod. The middle screw is fitted and locked with the plug screw hole. The bottom smooth rod is inserted into any one of the locking blind hole I or the locking blind hole II opened at the lower left end of the primary swivel arm. The middle of the connecting shaft is in clearance fit with the sliding arm pin hole.

[0007] As a further aspect of the present invention: The secondary rotating arm is slidably connected to the runway-shaped groove.

[0008] As a further aspect of the present invention: The secondary rotating arm is rotatably connected to the coupling shaft.

[0009] As a further aspect of the present invention: On the left side of the main rotating arm, there are also provided a locking blind hole I and a locking blind hole II for locking with a dowel screw when the main rotating arm rotates to different angles.

[0010] As a further aspect of the present invention: The coupling shaft, the rotating arm support, the vertical tenon pin and the lateral tenon pin are made of a titanium alloy material that can be developed under X-ray.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The adjustable bone fusion part of the present device is made of titanium alloy material, which increases the imaging ability of the fusion device, makes the surgical operation more precise and easy to operate, and reduces the surgical difficulty.

[0012] The adjustable fusion part of the present device is made of PEEK material, which is beneficial for evaluating the new bone formation inside and outside the fusion device through imaging methods.

[0013] The adjustable fusion device of the present device realizes the bending movement of the kinematic pair through the sliding of the ball head slide in the runway-shaped groove, the rotation of the sliding arm on the central shaft pin, and the rotation of the cylindrical boss in the through hole. Then, the kinematic pair is locked by inserting a dowel screw into one of the locking blind holes on the rotating boom at different positions, so as to adjust the bone grafting space size of the fusion device and adapt to the intervertebral recovery of patients with different degrees of intervertebral disc injury diseases. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the exploded structural schematic diagram of the present device;

[0015] Figure 2 is the axonometric exploded structural schematic diagram of the kinematic pair of the present device;

[0016] Figure 3 is the axonometric exploded structural schematic diagram of the fixed seat of the present device;

[0017] Figure 4 is the overall top view schematic diagram of the kinematic pair of the present device in the first locking position;

[0018] Figure 5 is the overall top view schematic diagram of the kinematic pair of the present device in the second locking position;

[0019] Figure 6 is the schematic diagram of the rotating arm support of the present device.

[0020] In the figure: 1 - fixed seat, 2 - kinematic pair, 3 - dowel screw, 11 - chute base, 12 - vertical tenon pin, 13 - swing arm support, 111 - runway-shaped groove, 112 - base tenon, 131 - support U-shaped groove, 132 - main arm mounting hole, 133 - dowel screw hole, 134 - gripper screw hole, 1311 - vertical tenon pin hole, 21 - sliding arm, 22 - coupling shaft, 23 - secondary swing arm, 24 - lateral tenon pin, 25 - main swing arm, 211 - ball head slide, 212 - sliding arm tenon, 231 - secondary arm U-shaped groove, 232 - secondary arm tenon, 251 - main arm U-shaped groove, 252 - cylindrical boss, 253 - locking blind hole I, 254 - locking blind hole II, 2121 - sliding arm tenon pin hole, 2311 - secondary arm groove pin hole, 2321 - secondary arm tenon pin hole, 31 - nut, 32 - middle screw rod, 33 - pointed smooth rod. Detailed implementation mode

[0021] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0022] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0023] Please refer to Figures 1-6, in the embodiments of the present invention, an adjustable bone graft space fusion device includes: a fixed seat 1, a kinematic pair 2, and a dowel screw 3. It is characterized in that the fixed seat 1 includes a chute base 11, a vertical tenon pin 12, and a swing arm support 13. The chute base 11 is composed of a runway-shaped groove 111 and a base tenon 112. The kinematic pair 2 includes a sliding arm 21, a connecting shaft 22, a secondary swing arm 23, a lateral tenon pin 24, and a main swing arm 25. The ball head slide 211 at the upper right end of the sliding arm 21 is inserted into the runway-shaped groove 111. The sliding arm tenon 212 opened at the left end of the sliding arm 21 is fitted and installed with the secondary arm U-shaped groove 231 opened at the right end of the secondary swing arm 23. A sliding arm tenon pin hole 2121 is opened on the sliding arm tenon 212, and the sliding arm tenon pin hole 2121 is installed with a clearance in the middle of the connecting shaft 22. Both ends of the connecting shaft 22 are riveted to the secondary arm groove pin holes 2311 at the upper and lower parts of the secondary arm U-shaped groove 231. A secondary arm tenon 232 is opened at the left end of the secondary swing arm 23. A secondary arm tenon pin hole 2321 is opened on the secondary arm tenon 232. After the secondary arm tenon 232 is installed in the main arm U-shaped groove 251 opened at the right end of the main swing arm 25, it is riveted through the lateral tenon pin 24. A cylindrical boss 252 is provided at the upper left end of the main swing arm 25. The cylindrical boss 252 is installed in the main arm mounting hole 132 opened at the lower right of the swing arm support 13. The cylindrical boss 252 and the main arm mounting hole 132 are in clearance fit. The dowel screw 3 is composed of a top nut 31, a middle screw 32, and a bottom smooth rod 33. The middle screw 32 is locked in cooperation with the dowel screw hole 133. The bottom smooth rod 33 is inserted into any one of the locking blind hole I 253 or the locking blind hole II 254 opened at the lower left end of the main swing arm. The middle of the connecting shaft 22 is in clearance fit with the sliding arm pin hole 2121.

[0024] Before the device is used, first screw out the dowel screw 3 from the swing arm support 13, then adjust the kinematic pair 2 to a suitable position, and then screw the dowel screw 3 into the swing arm support 13 so that the pointed smooth rod 33 of the dowel screw 3 is inserted into the locking blind hole I 253 or the locking blind hole II 254 at the left end of the rotating boom 25 to form a bone graft bin suitable for the patient's intervertebral disc disease.

[0025] The secondary swing arm 23 is slidably connected to the runway-shaped groove 111, and the secondary swing arm 23 is rotatably connected to the connecting shaft 22. The secondary swing arm 23 can not only slide left and right in the runway-shaped groove 111 but also freely rotate around the connecting shaft 22.

[0026] The main swing arm 25 is also provided with a locking blind hole I 253 and a locking blind hole II 254 for locking with the dowel screw 3 when the main swing arm 25 rotates to different angles.

[0027] The connecting shaft 22, the swing arm support 13, the vertical tenon pin 12, and the lateral tenon pin 24 are made of titanium alloy material that can be developed under X-ray.

[0028] The adjustable implant fusion device of this apparatus is made of titanium alloy material, which increases the imaging ability of the fusion device, makes the surgical operation more precise and easier, and reduces the surgical difficulty.

[0029] The adjustable fusion device of this apparatus is made of PEEK material, which is beneficial to evaluating the new bone formation inside and outside the fusion device through imaging methods.

[0030] The adjustable fusion device of this apparatus realizes the bending motion of the kinematic pair through the sliding of the ball head slide 211 in the runway-shaped groove 11, the rotation of the slide arm 21 on the central shaft pin, and the rotation of the cylindrical boss 252 in the through hole. Then, the pin screw 3 is inserted into one of the locking blind holes on the rotating boom at different positions to lock the kinematic pair 3, so as to adjust the bone grafting space size of the fusion device and adapt to the intervertebral recovery of patients with different degrees of intervertebral disc injury diseases.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An adjustable bone grafting space fusion device, comprising: A fixed seat (1), a kinematic pair (2) and a dowel screw (3), characterized in that the fixed seat (1) comprises a chute base (11), a vertical tenon pin (12) and a swing arm support (13), the chute base (11) consists of a runway-shaped groove (111) and a base tenon (112), the kinematic pair (2) comprises a sliding arm (21), a connecting shaft (22), a secondary swing arm (23), a lateral tenon pin (24) and a main swing arm (25), a ball head sliding table (211) at the upper right end of the sliding arm (21) is inserted into the runway-shaped groove (111), a sliding arm tenon (212) opened at the left end of the sliding arm (21) is fitted and installed with a secondary arm U-shaped groove (231) opened at the right end of the secondary swing arm (23), a sliding arm tenon pin hole (2121) is opened on the sliding arm tenon (212), the sliding arm tenon pin hole (2121) is installed with a clearance in the middle of the connecting shaft (22), both ends of the connecting shaft (22) are riveted on secondary arm groove pin holes (2311) at the upper and lower parts of the secondary arm U-shaped groove (231), a secondary arm tenon (232) is opened at the left end of the secondary swing arm (23), a secondary arm tenon pin hole (2321) is opened on the secondary arm tenon (232), after the secondary arm tenon (232) is installed in a main arm U-shaped groove (251) opened at the right end of the main swing arm (25), it is riveted by the lateral tenon pin (24), a cylindrical boss (252) is provided at the upper left end of the main swing arm (25), the cylindrical boss (252) is installed on a main arm mounting hole (132) opened at the lower right of the swing arm support (13), and the cylindrical boss (252) is in clearance fit with the main arm mounting hole (132), a dowel screw hole (133) is opened at the lower left end of the left side of the swing arm support (13), the dowel screw (3) consists of a top nut (31), a middle screw rod (32) and a bottom smooth rod (33), the middle screw rod (32) is fitted and locked with the dowel screw hole (133), the bottom smooth rod (33) is inserted into any one of a locking blind hole I (253) or a locking blind hole II (254) opened at the lower left end of the left side of the main swing arm, the middle of the connecting shaft (22) is in clearance fit with the sliding arm tenon pin hole (2121), the secondary swing arm (23) is slidably connected with the runway-shaped groove (111), the secondary swing arm (23) is rotatably connected with the connecting shaft (22), locking blind holes I (253) and locking blind holes II (254) for locking the main swing arm (25) at different angles by the dowel screw (3) when the main swing arm (25) rotates are further opened at the lower left end of the left side of the main swing arm (25), and the connecting shaft (22), the swing arm support (13), the vertical tenon pin (12) and the lateral tenon pin (24) are made of a titanium alloy material that can be developed under X-rays.

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