Vertebral prosthesis

Abstract

This invention provides a vertebral prosthesis, comprising: a base; and multiple support mechanisms arranged around the outer periphery of the base. Each support mechanism includes a support component and a transmission component. The support component is movably connected to the base. The top and bottom of the support component respectively support two adjacent vertebrae. A first end of the transmission component is connected to a side of the support component. The multiple support mechanisms have an initial position and an expanded position. When the support mechanism is in the initial position, there is a first distance between the support mechanism and the base. When the support mechanism is in the expanded position, there is a second distance between the support mechanism and the base. The first distance is smaller than the second distance. The technical solution of this application effectively solves the problem that the external dimensions of vertebral prostheses cannot be changed in related technologies.

Description

Technical Field

[0001] This invention relates to the field of vertebral prosthesis technology, and more specifically, to a vertebral prosthesis. Background Technology

[0002] In the field of spinal surgery, especially for vertebral lesions such as vertebral fractures, vertebral tumors, or severe vertebral degeneration, vertebral prosthesis implantation is a common method for restoring spinal stability, reconstructing the normal morphology of the vertebrae, and maintaining or improving spinal physiological function. However, most vertebral prostheses are currently manufactured using traditional processing techniques, and most vertebral prosthesis products are of fixed sizes, making it difficult to adapt vertebral prostheses to the individualized needs of each patient.

[0003] Specifically, traditional vertebral prosthesis designs have failed to adequately consider the significant anatomical differences among patients. For example, there are clear differences in skeletal structure between young, tall patients and older, smaller patients. The former often require larger diameter and height vertebral prostheses to ensure sufficient support and good fit with surrounding tissues, while the latter are better suited to smaller prostheses to reduce surgical trauma and improve surgical precision.

[0004] However, existing vertebral prostheses generally come in multiple sizes. When determining the size of a vertebral prosthesis, only a prosthesis that is close to the patient's vertebral body size can be selected. This cannot accurately meet the individual needs of different patients. This not only limits the surgical results, but may also lead to poor fit between the prosthesis and the vertebra, affecting the restoration of the physiological curvature of the spine and causing problems such as insufficient postoperative stability. Summary of the Invention

[0005] The main objective of this invention is to provide a vertebral prosthesis to solve the problem that the external dimensions of vertebral prostheses in related technologies cannot be changed.

[0006] To achieve the above objectives, according to one aspect of the present invention, a vertebral prosthesis is provided, comprising: a base; a plurality of support mechanisms, the plurality of support mechanisms being arranged around the outer periphery of the base, each support mechanism including a support component and a transmission component, the support component being movably connected to the base, the top and bottom of the support component supporting two adjacent vertebrae respectively, the first end of the transmission component being connected to the side of the support component, wherein the plurality of support mechanisms have an initial position and an expanded position, when the support mechanism is in the initial position, there is a first distance between the support mechanism and the base, and when the support mechanism is in the expanded position, there is a second distance between the support mechanism and the base, the first distance being less than the second distance; an operating mechanism including a driving member, the driving member being rotatably disposed on the base, the driving member being driven to engage with the second end of each transmission component, the driving member driving the support component to move along the radial direction of the base via the transmission component.

[0007] Furthermore, the driving component is provided with multiple driving grooves, which are arranged sequentially around the rotation axis of the driving component. The transmission component includes a connecting part and a transmission part. The connecting part is connected between the transmission part and the side of the support assembly. The axis of the transmission part is arranged parallel to the rotation axis of the driving component. The end of the transmission part away from the connecting part is inserted into the driving groove.

[0008] Furthermore, the driving component includes a driving plate, and the driving groove is a straight groove, with the beginning and end of multiple driving grooves connected sequentially on the driving plate.

[0009] Furthermore, the connecting part includes a first connecting plate, and the transmission part includes a transmission rod.

[0010] Furthermore, the support assembly includes a base, which is movably disposed on the base along the radial direction of the base. One of the bases has a through hole. The first end of the transmission member is connected to the side of the base. The operating mechanism also includes an operating member and a universal joint. The operating member is rotatably disposed in the through hole. The driving member includes a driving plate and a driving column. The driving plate is in transmission cooperation with the base. The driving plate is rotatably disposed on the base. The driving column is disposed on the driving plate. The universal joint is movably connected between the operating member and the driving column.

[0011] Furthermore, the support assembly includes a base and an upper end plate disposed above the base, the first end of the transmission member is connected to the side of the base, and the upper end plate is movably disposed on the base along the axial direction of the drive member.

[0012] Furthermore, the support mechanism also includes a position adjustment assembly, which includes a locking structure and an elastic element. The elastic element is located between the base and the upper end plate. The elastic element applies a force to the upper end plate in a direction away from the base. The locking structure has a locked state and an unlocked state. When the locking structure is in the locked state, the relative position between the upper end plate and the base remains fixed. When the locking structure is in the unlocked state, the upper end plate can move on the base.

[0013] Furthermore, the locking structure includes a first guide member, a mounting base, a second connecting plate, a third connecting plate, and a locking screw. The first guide member is movably disposed on the base in the radial direction of the base. The mounting base is movably disposed on the first guide member in the radial direction of the base. The two ends of the second connecting plate are respectively hinged to the mounting base and the base. The two ends of the third connecting plate are respectively hinged to the mounting base and the upper end plate. The mounting base is provided with a threaded hole. When the locking structure is in the locked state, the locking screw passes through the threaded hole and abuts against the outer surface of the first guide member.

[0014] Furthermore, the support mechanism also includes a second guide member, with an elastic element sleeved around the outer periphery of the second guide member. The second guide member includes a guide rod and a guide cylinder, with the guide rod passing through the guide cylinder. One of the guide rod and the guide cylinder is located on the side of the upper end plate near the base, and the other of the guide rod and the guide cylinder is located on the side of the base near the upper end plate.

[0015] Furthermore, the driving component includes a driving plate, and the base includes a base body, a top plate, and a support rod connecting the base body and the top plate. The driving plate is rotatably mounted on the base body and located between the base body and the top plate.

[0016] According to the technical solution of this invention, the vertebral prosthesis includes a base, multiple support mechanisms, and an operating mechanism. A driving member rotates on the base, driving a transmission member to move, which in turn drives the support components to move radially along the base, allowing the support mechanisms to switch from an initial position to an expanded position. A first distance is less than a second distance; that is, when the support mechanism is in the expanded position, the area enclosed by the side of the multiple support components away from the base is larger than the area enclosed by the side of the multiple support components away from the base when the support mechanism is in the initial position. This allows the external dimensions of the vertebral prosthesis to change under the action of the driving member and the transmission member, thus enabling the external dimensions of the vertebral prosthesis to be adjusted according to the size of the vertebra. Therefore, the technical solution of this application effectively solves the problem in related technologies where the external dimensions of the vertebral prosthesis cannot be changed. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the vertebral prosthesis according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 A cross-sectional schematic diagram of a vertebral prosthesis;

[0020] Figure 3 It shows Figure 1 A three-dimensional structural diagram showing the connection between the base and support mechanism of the vertebral prosthesis;

[0021] Figure 4 It shows Figure 1 A three-dimensional structural diagram showing the connection between the support mechanism and the operating mechanism of a vertebral prosthesis;

[0022] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the support mechanism of the vertebral prosthesis when it is in the expanded position;

[0023] Figure 6 It shows Figure 5 A cross-sectional schematic diagram of a vertebral prosthesis;

[0024] Figure 7 It shows Figure 5 A three-dimensional structural diagram showing the connection between the support mechanism and the operating mechanism of the vertebral prosthesis.

[0025] The above figures include the following reference numerals:

[0026] 10. Base; 11. Seat body; 12. Top plate; 13. Support rod; 20. Support mechanism; 21. Support assembly; 211. Base; 2111. Through hole; 212. Upper end plate; 22. Transmission component; 221. Connecting part; 222. Transmission part; 23. Position adjustment assembly; 231. Locking structure; 2311. First guide; 2312. Mounting seat; 23121. Threaded hole; 2313. Second connecting plate; 2314. Third connecting plate; 2315. Locking screw; 232. Elastic component; 24. Second guide; 241. Guide rod; 242. Guide cylinder; 30. Operating mechanism; 31. Driving component; 311. Driving groove; 312. Driving plate; 313. Driving column; 32. Operating component; 33. Universal joint. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0030] like Figure 1 , Figures 3 to 5 As shown, the vertebral prosthesis of this embodiment includes: a base 10, multiple support mechanisms 20, and an operating mechanism 30. Multiple support mechanisms 20 are arranged around the outer periphery of the base 10. Each support mechanism 20 includes a support component 21 and a transmission component 22. The support component 21 is movably connected to the base 10. The top and bottom of the support component 21 respectively support two adjacent vertebrae. The first end of the transmission component 22 is connected to the side of the support component 21. The multiple support mechanisms 20 have an initial position and an expanded position. When the support mechanism 20 is in the initial position, there is a first distance between the support mechanism 20 and the base 10. When the support mechanism 20 is in the expanded position, there is a second distance between the support mechanism 20 and the base 10. The first distance is smaller than the second distance. The operating mechanism 30 includes a drive component 31, which is rotatably mounted on the base 10. The drive component 31 is driven to engage with the second end of each transmission component 22. The drive component 31 drives the support component 21 to move radially along the base 10 via the transmission component 22.

[0031] Applying the technical solution of this embodiment, the vertebral prosthesis includes a base 10, multiple support mechanisms 20, and an operating mechanism 30. The driving member 31 rotates on the base 10, driving the transmission member 22 to move. The transmission member 22 then drives the support components 21 to move radially along the base 10, allowing the support mechanisms 20 to switch from an initial position to an expanded position. A first distance is less than a second distance; that is, when the support mechanism 20 is in the expanded position, the area enclosed by the side of the multiple support components 21 away from the base 10 is greater than the area enclosed by the side of the multiple support components 21 away from the base 10 when the support mechanism 20 is in the initial position. This allows the external dimensions of the vertebral prosthesis to change under the action of the driving member 31 and the transmission member 22, thereby allowing the external dimensions of the vertebral prosthesis to be adjusted according to the size of the vertebra. Therefore, the technical solution of this embodiment effectively solves the problem in related technologies where the external dimensions of the vertebral prosthesis cannot be changed.

[0032] It should be noted that the first distance and the second distance both refer to the distance between the side of the support component 21 closest to the base 10 and the outer surface of the base 10.

[0033] Specifically, the side of the multiple support components 21 away from the base 10 forms a cylindrical area, that is, when the support components 21 move, the diameter of the cylindrical area formed by the side of the multiple support components 21 away from the base 10 can be changed.

[0034] like Figures 2 to 4 as well as Figure 6 As shown, in this embodiment, the driving member 31 is provided with multiple driving grooves 311, which are arranged sequentially around the rotation axis of the driving member 31. The transmission member 22 includes a connecting part 221 and a transmission part 222. The connecting part 221 connects the transmission part 222 and the side of the support assembly 21. The axis of the transmission part 222 is parallel to the rotation axis of the driving member 31. The end of the transmission part 222 away from the connecting part 221 is inserted into the driving groove 311. When the driving member 31 rotates, the driving groove 311 can rotate, which in turn drives the transmission part 222 to move. This allows the transmission part 222 to drive the connecting part 221 to move, which in turn drives the support assembly 21 to move. This allows the support assembly 21 to move towards the base 10 or away from the base 10, thereby changing the area of ​​the region enclosed by the side of the multiple support assemblies 21 away from the base 10. In other words, the support mechanism 20 can switch between the initial position and the expanded position. The axis of the transmission part 222 is set parallel to the rotation axis of the drive member 31, so that when the drive member 31 rotates, the transmission part 222 slides in the drive groove 311, and the transmission part 222 can drive the support assembly 21 to move in the radial direction of the base 10 through the connecting part 221.

[0035] like Figure 3 and Figure 4 As shown, in this embodiment, the driving component 31 includes a driving plate 312, and the driving groove 311 is a straight groove. Multiple driving grooves 311 are sequentially connected end-to-end on the driving plate 312. Setting the driving groove 311 as a straight groove simplifies its movement trajectory and facilitates the design of the specific dimensions of the driving groove 311 and the transmission part 222. The sequential connection of the multiple driving grooves 311 allows the transmission part 222 to move to the end of each driving groove 311. At this point, the distance between the support component 21 and the base 10 is maximized on the side closest to the base 10.

[0036] It should be noted that when the transmission part 222 is located at both ends of the drive slide, the distance between the support component 21 and the base 10 is the largest on the side closer to the base 10. That is, at this time, the area enclosed by the side of the multiple support components 21 away from the base 10 is the largest.

[0037] When the transmission part 222 is located in the middle of the drive slide, the distance between the support assembly 21 and the base 10 is the smallest. That is, at this time, the area enclosed by the side of the multiple support assemblies 21 away from the base 10 is the smallest.

[0038] Specifically, in this embodiment, the drive slide includes five.

[0039] Five drive grooves form a regular pentagonal structure. The rotation axis of the drive component 31 is the center line of the regular pentagonal structure, and the rotation axis of the drive component 31 coincides with the axis of the base.

[0040] In other embodiments, the drive groove 311 may also be an arc-shaped groove, but multiple arc-shaped grooves are not connected, and the axis of the arc-shaped groove does not coincide with the rotation axis of the drive member 31.

[0041] like Figure 4 and Figure 7 As shown, in this embodiment, the connecting part 221 includes a first connecting plate, and the transmission part 222 includes a transmission rod. The transmission rod can slide more smoothly within the drive slide groove 311. When the drive slide groove 311 rotates, it can drive the transmission rod to move in the radial direction of the base 10, thereby driving the connecting part 221 to move in the radial direction of the base 10, and thus the connecting part 221 can drive the support assembly 21 to move in the radial direction of the base 10. The first connecting plate is provided to facilitate the processing and manufacturing of the connecting part 221.

[0042] It should be noted that in other embodiments, the transmission part 222 can also be a transmission plate. The height direction of the transmission plate is the axial direction of the transmission plate. In the thickness direction of the transmission plate, both side walls of the transmission plate are arc-shaped side walls, and the middle of both arc-shaped side walls protrudes from the axis of the transmission plate to the outside of the transmission plate. The two side walls of the transmission plate in the width direction contact the two sides of the drive slide groove 311 respectively. The width direction of the transmission plate is parallel to the width direction of the drive slide groove 311. The height direction of the transmission plate is parallel to the depth direction of the drive slide groove.

[0043] like Figure 3 , Figure 4 as well as Figure 7 As shown, in this embodiment, the support component 21 includes a base 211, which is movably disposed on the base 10 along the radial direction of the base 10. One of the multiple bases 211 is provided with a through hole 2111. The first end of the transmission component 22 is connected to the side of the base 211. The operating mechanism 30 also includes an operating component 32 and a universal joint 33. The operating component 32 is rotatably disposed in the through hole 2111. The driving component 31 includes a driving plate 312 and a driving column 313. The driving plate 312 is in transmission cooperation with the base 211. The driving plate 312 is rotatably disposed on the base 10. The driving column 313 is disposed on the driving plate 312. The universal joint 33 is movably connected between the operating component 32 and the driving column 313. Through the through hole 2111, the operating member 32 can be operated, so that the operating member 32 can rotate relative to the base within the through hole 2111. Then, the operating member 32 can drive the drive column 313 and the drive plate 312 to rotate through the universal joint 33. Then, the drive plate 312 can drive the base 211 to move in the radial direction of the base 10.

[0044] The drive slide 311 is mounted on the drive board 312.

[0045] It should be noted that the universal joint 33 includes a first transmission rod and a second transmission rod that are connected to each other, and the first transmission rod and the second transmission rod are arranged vertically.

[0046] The middle part of the first transmission rod is connected to the middle part of the second transmission rod.

[0047] Specifically, the operating component 32 includes an operating lever, a first operating plate, and a second operating plate. The first operating plate and the second operating plate are spaced apart at the first end of the operating lever, and the two ends of the first transmission rod are hinged to the first operating plate and the second operating plate, respectively.

[0048] The second end of the control lever is the operating end.

[0049] The second end of the operating lever is provided with an internal hexagonal operating hole.

[0050] The drive column 313 includes a first column, a third operating plate, and a fourth operating plate. The third and fourth operating plates are spaced apart at the first end of the first column. The two ends of the second transmission rod are hinged to the third and fourth operating plates, respectively. The second end of the first column is connected to the drive plate 312.

[0051] like Figure 1 , Figure 3 , Figure 5 as well as Figure 7 As shown, in this embodiment, the support assembly 21 includes a base 211 and an upper endplate 212 disposed above the base 211. The first end of the transmission member 22 is connected to the side of the base 211, and the upper endplate 212 is movably disposed on the base 211 along the axial direction of the drive member 31. The side of the base 211 away from the upper endplate 212 and the side of the upper endplate 212 away from the base 211 can respectively support two adjacent vertebrae. The upper endplate 212 is movably disposed on the base 211 along the axial direction of the drive member 31, which allows the distance between the upper endplate 212 and the base 211 to be changed. This allows the distance between the side of the upper endplate 212 away from the base 211 and the side of the base 211 away from the upper endplate 212 to be adjusted according to the distance between the two vertebrae. That is, the height of the support assembly 21 can be adjusted according to the distance between two adjacent vertebrae, so that the vertebral prosthesis can more effectively support the two adjacent vertebrae. By adjusting the distance between the base 211 and the upper endplate 212, the height of the vertebral prosthesis can be adapted to the distance between two adjacent vertebrae, thus further realizing the change of the external dimensions of the vertebral prosthesis.

[0052] It should be noted that the base 211 is a sector-shaped block.

[0053] The side of the base 211 closest to the base 10 is an arc-shaped surface, and the side of the base 211 furthest from the base 10 is also an arc-shaped surface.

[0054] It should be noted that the connecting part 221 is connected to the side of the base 211 near the base 10.

[0055] Multiple upper endplates 212 are set independently of each other, that is, the relative position of the base 211 of each support mechanism 20 and the upper endplate can be adjusted individually, so as to adapt to different bone structures.

[0056] like Figure 3 , Figure 4 as well as Figure 7As shown, in this embodiment, the support mechanism 20 further includes a position adjustment component 23. The position adjustment component 23 includes a locking structure 231 and an elastic element 232. The locking structure 231 is disposed between the base 211 and the upper end plate 212, and the elastic element 232 is located between the base 211 and the upper end plate 212. The elastic element 232 applies a force to the upper end plate 212 in a direction away from the base 211. The locking structure 231 has a locked state and an unlocked state. When the locking structure 231 is in the locked state, the relative position between the upper end plate 212 and the base 211 remains fixed. When the locking structure 231 is in the unlocked state, the upper end plate 212 can move on the base 211. When the locking structure 231 is in the locked state, the relative position between the upper end plate 212 and the base 211 remains unchanged, that is, the relative position between the upper end plate 212 and the base 211 remains fixed. When the locking structure 231 is in the unlocked state, the upper end plate 212 can move relative to the base 211, thereby changing the distance between the side of the upper end plate 212 away from the base 211 and the side of the base 211 away from the upper end plate 212, thus changing the height of the support component 21.

[0057] It should be noted that the elastic element 232 includes a spring.

[0058] like Figure 3 and Figure 7As shown, in this embodiment, the locking structure 231 includes a first guide member 2311, a mounting base 2312, a second connecting plate 2313, a third connecting plate 2314, and a locking screw 2315. The first guide member 2311 is movably disposed on the base 10 along the radial direction of the base 10. The mounting base 2312 is movably disposed on the first guide member 2311 along the radial direction of the base 10. The two ends of the second connecting plate 2313 are hinged to the mounting base 2312 and the base 211, respectively. The two ends of the third connecting plate 2314 are hinged to the mounting base 2312 and the upper end plate 212, respectively. The mounting base 2312 is provided with a threaded hole 23121. When the locking structure 231 is in the locked state, the locking screw 2315 passes through the threaded hole 23121 and abuts against the outer surface of the first guide member 2311. The first guide member 2311 is movably disposed on the base 10 radially, so that when the support assembly 21 moves radially along the base 10, the first guide member 2311 can guide the movement of the support assembly 21. The second connecting plate 2313 is hinged to the mounting base 2312 and the base 211, so that the second connecting plate 2313 can rotate relative to the mounting base 2312 and the base 211, facilitating the movement of the upper end plate 212. The third connecting plate 2314 is hinged to the mounting base 2312 and the upper end plate 212, so that the third connecting plate 2314 can rotate relative to the mounting base 2312 and the base 211, facilitating the movement of the upper end plate 212. By disengaging the locking screw 2315 from the outer surface of the first guide member 2311, the locking screw 2315 no longer restricts the movement of the mounting base 2312 relative to the first guide member 2311 when the mounting base 2312 moves relative to the first guide member 2311.

[0059] Specifically, when the locking screw 2315 disengages from the outer surface of the first guide member 2311, under the elastic force of the elastic member 232, the upper end plate 212 can move away from the base 211. During the movement of the upper end plate 212, the upper end plate 212 can drive the end of the third connecting plate 2314 connected to the mounting base 2312 to move along the radial direction of the base 10 towards the support assembly 21. Then, the third connecting plate 2314 can drive the mounting base 2312 to move along the radial direction of the base 10 towards the support assembly 21. Then, the mounting base 2312 can drive the end of the second connecting plate 2313 hinged to the mounting base 2312 to move along the radial direction of the base 10 towards the support assembly 21.

[0060] It should be noted that a first guide hole is provided on the base 10, and the first guide member 2311 is movably inserted into the first guide hole.

[0061] The first guide hole includes multiple first guide holes, and each of the multiple first guide holes is arranged in a one-to-one correspondence with a multiple first guide member 2311. The multiple first guide holes are spaced apart along the circumferential direction of the base 10.

[0062] The first guide member 2311 includes a first connecting rod.

[0063] The mounting base 2312 is provided with a second guide hole, and the first connecting rod passes through the second guide hole.

[0064] The second guide hole is connected to the threaded hole 23121.

[0065] The side of the mounting base 2312 is provided with a second connecting rod and a third connecting rod at intervals, and the second connecting plate 2313 is provided with a first mounting hole and a second mounting hole at intervals.

[0066] The third connecting plate 2314 is provided with a third mounting hole and a fourth mounting hole at intervals. The second connecting rod passes through the third mounting hole and the third connecting rod passes through the first mounting hole.

[0067] Specifically, the upper end plate 212 is provided with a first receiving groove, the support mechanism 20 also includes a fourth connecting rod, the upper end plate 212 is provided with a fifth mounting hole communicating with the first receiving groove, and the fourth connecting rod passes through the fifth mounting hole and the fourth mounting hole.

[0068] The first receiving groove extends through the thickness direction of the upper end plate 212.

[0069] The base 211 is provided with a second receiving groove, and the support mechanism 20 also includes a fifth connecting rod. The base 211 is provided with a sixth mounting hole that communicates with the second receiving groove, and the fifth connecting rod passes through the sixth mounting hole and the second mounting hole.

[0070] Except for the locking screw 2315 and the elastic element 232, the other structures of the vertebral prosthesis can be manufactured by 3D printing.

[0071] In other embodiments, the position adjustment assembly 23 includes a first screw, a first adjusting nut, and a second adjusting nut. An upper end plate 212 is movably mounted on the base 211 along its height direction. The upper end plate 212 has a first clearance hole extending through its thickness direction. The first screw passes through the first clearance hole, which contains a first step. The first adjusting nut is fitted against the side of the first step away from the base 211. The second adjusting nut is located on the side of the upper end plate 212 closest to the base 211. Both the first and second adjusting nuts are threadedly engaged with the first screw. By rotating the first and second adjusting nuts, their positions on the first screw can be changed, thereby adjusting the position of the upper end plate 212 relative to the base 211.

[0072] like Figure 3 and Figure 7 As shown, in this embodiment, the support mechanism 20 further includes a second guide member 24. An elastic member 232 is sleeved on the outer periphery of the second guide member 24. The second guide member 24 includes a guide rod 241 and a guide cylinder 242. The guide rod 241 passes through the guide cylinder 242 and is positioned on the side of the upper end plate 212 near the base 211. The guide cylinder 242 is positioned on the side of the base 211 near the upper end plate 212. By providing the guide rod 241 and guide cylinder 242, the upper end plate 212 can move relative to the base 211 along the height direction of the base 211. That is, the guide rod 241 and guide cylinder 242 guide the movement of the upper end plate 212.

[0073] Specifically, both the guide rod 241 and the guide cylinder 242 are circular structures, so the locking structure 231 can not only play a locking role, but also prevent the upper end plate 212 from rotating relative to the base 211.

[0074] In other embodiments, the guide cylinder 242 is disposed on the side of the upper end plate 212 near the base 211, and the guide rod 241 is disposed on the side of the base 211 near the upper end plate 212.

[0075] In other embodiments, the locking structure 231 differs from the locking structure in this embodiment. The locking structure 231 includes a second screw and a third adjusting nut. A second clearance hole penetrating the thickness direction of the upper end plate 212 is provided on the upper end plate 212. The second screw passes through the second clearance hole, which contains a second step. The third adjusting nut is fitted against the side of the second step away from the base, and the third adjusting nut is threadedly engaged with the second screw. By rotating the third adjusting nut, and with the cooperation of the second screw and the second guide member 24, the upper end plate 212 can move along the height direction of the base 211, thereby adjusting the distance between the side of the upper end plate 212 away from the base 211 and the side of the base 211 away from the upper end plate 212.

[0076] like Figure 3 As shown, in this embodiment, the driving component 31 includes a driving plate 312, and the base 10 includes a base body 11, a top plate 12, and a support rod 13 connecting the base body 11 and the top plate 12. The driving plate 312 is rotatably mounted on the base body 11 and located between the base body 11 and the top plate 12. The base body 11 can support the driving plate 312. The support rod 13 can connect the base body 11 and the top plate 12.

[0077] It should be noted that the support rods 13 include multiple rods spaced apart, which are spaced apart in the circumferential direction of the base 10. This allows the support rods 13 to not only connect the base 11 and the top plate 12, but also to create a gap between the base 11 and the top plate 12, facilitating the installation of the drive plate 312 and the drive column 313 between the base 11 and the top plate 12.

[0078] It should be noted that the base 11 is a cylindrical structure.

[0079] The base 10 also includes a second column, which is disposed on the side of the top plate 12 away from the base 11. A plurality of first guide holes are spaced apart on the outer peripheral surface of the second column.

[0080] Specifically, the drive unit 31 also includes a rotating shaft rotatably disposed on the base 10, and the rotating shaft and the drive column 313 are located on both sides of the thickness direction of the drive plate 312.

[0081] A connecting hole is provided on the side of the base 11 near the top plate 12, and the rotating shaft is rotatably inserted into the connecting hole.

[0082] The side of the upper endplate 212 away from the base 211 and the side of the base 211 away from the upper endplate 212 are trabecular structures. The porous structure of the trabecular structures enables bone ingrowth, ensuring the long-term stability of the prosthesis.

[0083] In this embodiment, when using the vertebral prosthesis, the support mechanism 20 can be placed in the initial position first, and then the support mechanism 20 can be placed between the two vertebrae. This makes it easier to place the vertebral prosthesis between the two vertebrae. Then, the support mechanism 20 can be switched from the initial position to the expanded position, that is, the operating member 32 is rotated. The operating member 32 can then drive the drive column 313 to rotate through the universal joint 33. The drive column 313 can then drive the drive plate 312 to rotate on the base 10. The drive plate 312 can then drive the drive slide 311 to rotate. The drive slide 311 can then drive the connecting part 221 to move in the radial direction of the base 10 through the transmission part 222. The connecting part 221 can then drive the base 211 to move in the radial direction of the base 10, so that the support mechanism 20 can be switched from the initial position to the expanded position.

[0084] When the support mechanism 20 is in the expanded position, by disengaging the locking screw 2315 from the first guide member 2311, the mounting base 2312 can move on the first guide member 2311, the second connecting plate 2313 can rotate relative to the mounting base 2312 and the base 211, and the third connecting plate 2314 can rotate relative to the mounting base 2312 and the base 211. As a result, the mounting base 2312 can move toward the support assembly 21, thereby adjusting the relative position of the upper end plate 212 and the base 211. That is, adjusting the distance between the side of the upper end plate 212 away from the base 211 and the side of the base 211 away from the upper end plate 212. At this time, the distance between the side of the upper end plate 212 away from the base 211 and the side of the base 211 away from the upper end plate 212 can be increased or decreased. When the distance between the side of the upper end plate 212 away from the base 211 and the side of the base 211 away from the upper end plate 212 increases, the elastic element 232 can apply an elastic force to the upper end plate 212 and the base 211. When the distance between the side of the upper end plate 212 away from the base 211 and the side of the base 211 away from the upper end plate 212 decreases, the upper end plate 212 can be pressed, causing the upper end plate 212 to move closer to the base 211. At the same time, the upper end plate 212 and the base 211 compress the elastic element 232.

[0085] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0086] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0087] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vertebral prosthesis, characterized in that, include: Base (10); Multiple support mechanisms (20) are arranged around the outer periphery of the base (10). Each support mechanism (20) includes a support component (21) and a transmission component (22). The support component (21) is movably connected to the base (10). The top and bottom of the support component (21) support two adjacent cones respectively. The first end of the transmission component (22) is connected to the side of the support component (21). The multiple support mechanisms (20) have an initial position and an expanded position. When the support mechanism (20) is in the initial position, there is a first distance between the support mechanism (20) and the base (10). When the support mechanism (20) is in the expanded position, there is a second distance between the support mechanism (20) and the base (10). The first distance is less than the second distance. The operating mechanism (30) includes a driving member (31), which is rotatably mounted on the base (10). The driving member (31) is driven to engage with the second end of each of the transmission members (22). The driving member (31) drives the support assembly (21) to move in the radial direction of the base (10) through the transmission members (22). The driving member (31) is provided with a plurality of driving grooves (311), and the plurality of driving grooves (311) are arranged sequentially around the rotation axis of the driving member (31). The transmission member (22) includes a connecting part (221) and a transmission part (222). The connecting part (221) is connected between the transmission part (222) and the side of the support assembly (21). The axis of the transmission part (222) is arranged parallel to the rotation axis of the driving member (31). One end of the transmission part (222) away from the connecting part (221) is inserted into the driving groove (311).

2. The vertebral prosthesis according to claim 1, characterized in that, The driving component (31) includes a driving plate (312), and the driving groove (311) is a straight groove. The heads and tails of a plurality of driving grooves (311) are connected in sequence on the driving plate (312).

3. The vertebral prosthesis according to claim 1, characterized in that, The connecting part (221) includes a first connecting plate, and the transmission part (222) includes a transmission rod.

4. The vertebral prosthesis according to any one of claims 1 to 3, characterized in that, The support assembly (21) includes a base (211), which is movably disposed on the base (10) along the radial direction of the base (10). One of the multiple bases (211) is provided with a through hole (2111). The first end of the transmission member (22) is connected to the side of the base (211). The operating mechanism (30) further includes an operating member (32) and a universal joint (33). The drive member (31) is rotatably inserted into the through hole (2111). The drive member (31) includes a drive plate (312) and a drive column (313). The drive plate (312) is in transmission cooperation with the base (211). The drive plate (312) is rotatably disposed on the base (10). The drive column (313) is disposed on the drive plate (312). The universal joint (33) is movably connected between the operating member (32) and the drive column (313).

5. The vertebral prosthesis according to any one of claims 1 to 3, characterized in that, The support assembly (21) includes a base (211) and an upper end plate (212) disposed above the base (211). The first end of the transmission member (22) is connected to the side of the base (211), and the upper end plate (212) is movably disposed on the base (211) along the axial direction of the drive member (31).

6. The vertebral prosthesis according to claim 5, characterized in that, The support mechanism (20) further includes a position adjustment component (23), which includes a locking structure (231) and an elastic element (232). The elastic element (232) is located between the base (211) and the upper end plate (212). The elastic element (232) applies a force to the upper end plate (212) to move away from the base (211). The locking structure (231) has a locked state and an unlocked state. When the locking structure (231) is in the locked state, the relative position between the upper end plate (212) and the base (211) remains fixed. When the locking structure (231) is in the unlocked state, the upper end plate (212) can move on the base (211).

7. The vertebral prosthesis according to claim 6, characterized in that, The locking structure (231) includes a first guide (2311), a mounting base (2312), a second connecting plate (2313), a third connecting plate (2314), and a locking screw (2315). The first guide (2311) is movably disposed on the base (10) in the radial direction, and the mounting base (2312) is movably disposed on the first guide (2311) in the radial direction of the base (10). The second connecting plate (2313) The two ends of the third connecting plate (2314) are respectively hinged to the mounting base (2312) and the base (211). The two ends of the third connecting plate (2314) are respectively hinged to the mounting base (2312) and the upper end plate (212). The mounting base (2312) is provided with a threaded hole (23121). When the locking structure (231) is in the locked state, the locking screw (2315) passes through the threaded hole (23121) and abuts against the outer surface of the first guide (2311).

8. The vertebral prosthesis according to claim 6, characterized in that, The support mechanism (20) further includes a second guide member (24), and the elastic member (232) is sleeved on the outer periphery of the second guide member (24). The second guide member (24) includes a guide rod (241) and a guide cylinder (242). The guide rod (241) passes through the guide cylinder (242). One of the guide rod (241) and the guide cylinder (242) is located on the side of the upper end plate (212) near the base (211), and the other of the guide rod (241) and the guide cylinder (242) is located on the side of the base (211) near the upper end plate (212).

9. The vertebral prosthesis according to any one of claims 1 to 3, characterized in that, The driving component (31) includes a driving plate (312), and the base (10) includes a seat body (11), a top plate (12), and a support rod (13) connected between the seat body (11) and the top plate (12). The driving plate (312) is rotatably disposed on the seat body (11) and located between the seat body (11) and the top plate (12).

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