CN114699227A

CN114699227A - Vertebral body prosthesis

Info

Publication number: CN114699227A
Application number: CN202210637970.7A
Authority: CN
Inventors: 韦峰; 李健; 赵亚杰; 刘忠军; 李志疆
Original assignee: Beijing Libeier Bio Engineering Institute Co Ltd
Current assignee: Beijing Libeier Bio Engineering Institute Co Ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-07-05
Anticipated expiration: 2042-06-08
Also published as: CN114699227B

Abstract

The invention provides a vertebral prosthesis, comprising: the vertebral body is provided with a lower end plate and is provided with a first mounting hole; the adjusting assembly comprises a height adjusting piece and an angle adjusting piece, the height adjusting piece is vertically movably arranged in the first mounting hole in a penetrating mode, the height adjusting piece is provided with a first hinge portion, the first hinge portion extends out of the first mounting hole, the height adjusting piece is provided with a second mounting hole, the angle adjusting piece is vertically movably arranged in the second mounting hole, the angle adjusting piece is provided with a second hinge portion, the second hinge portion extends out of the second mounting hole, and the extending directions of the axes of the first hinge portion and the second hinge portion are the same; the upper end plate is provided with a third hinging part and a fourth hinging part, the third hinging part is hinged with the first hinging part, and the fourth hinging part is hinged with the second hinging part. Through the technical scheme that this application provided, can solve among the correlation technique because the particularity of human anatomy brings the problem that the operation is loaded down with trivial details and a large amount of stocks.

Description

Vertebral body prosthesis

Technical Field

The invention relates to the technical field of prostheses, in particular to a vertebral prosthesis.

Background

Vertebral body tumors, severe comminuted fractures, and certain infectious diseases such as tuberculosis often cause damage to the vertebral body and may result in spinal cord, nerve damage or collapse of the vertebral segments and angular deformity of the spine. Patients with significant neurological dysfunction or angular deformity require a corpectomy.

At present, the appearance of the vertebral body prosthesis provides a reliable treatment method for patients with spinal tumor, spinal tuberculosis and trauma. In the related art, vertebral body prostheses are roughly classified into a filling type (bone cement), a supporting type (titanium mesh), and a supporting and fixing type. Due to the different designs, the vertebral body prosthesis also has different biomechanical stability. The supporting type (titanium net) fixing mode has the widest application range, the titanium net is placed at the excised vertebral body part to play a supporting role, and the steel plate screw fixing system is used for fixedly connecting an upper vertebral body and a lower vertebral body which are adjacent to the excised vertebral body.

However, due to the particularity of the human anatomy, the requirements for the specification and the size of the vertebral body prosthesis are different, the titanium mesh needs to be temporarily cut in the operation, and if a standard vertebral body prosthesis is adopted, a plurality of specification models need to be prepared, which brings the complexity of the operation and the increase of the stock quantity.

Disclosure of Invention

The invention provides a vertebral body prosthesis, which aims to solve the problems of complicated operation and large inventory caused by the particularity of human anatomy in the related art.

The invention provides a vertebral prosthesis, comprising: the lower end plate is arranged at the lower end of the vertebral body, the vertebral body is provided with a first mounting hole which is vertically arranged, and the first mounting hole penetrates through the upper end of the vertebral body; the adjusting assembly comprises a height adjusting piece and an angle adjusting piece, the height adjusting piece is vertically movably arranged in the first mounting hole in a penetrating mode, a first hinge part is arranged at the upper end of the height adjusting piece and extends out of the first mounting hole, the height adjusting piece is provided with a second mounting hole which is vertically arranged and penetrates through the upper end of the height adjusting piece, the angle adjusting piece is vertically movably arranged in the second mounting hole, a second hinge part is arranged at the upper end of the angle adjusting piece and extends out of the second mounting hole, and the extending directions of the axes of the first hinge part and the second hinge part are the same; the upper end plate is positioned above the height adjusting piece and the angle adjusting piece and is provided with a third hinged part and a fourth hinged part, the third hinged part is hinged with the first hinged part, and the fourth hinged part is hinged with the second hinged part.

Further, angle modulation spare includes swivel becket and lifting unit, and the swivel becket rotationally sets up in the second mounting hole, and lifting unit and swivel becket screw-thread fit and with the cooperation of splining of height control spare.

Furthermore, the angle adjusting piece further comprises a limiting ring, the limiting ring is sleeved on the outer side wall of the lifting piece, the limiting ring is located in the second mounting hole and is in limiting fit with the height adjusting piece, and the lower end face of the limiting ring is abutted to the upper end face of the rotating ring.

Furthermore, the angle adjusting piece also comprises a fixing pin, the lifting piece is provided with a first strip-shaped hole extending vertically, the side wall of the limiting ring is provided with a first fixing hole in a penetrating manner, the side wall of the height adjusting piece is provided with a second fixing hole in a penetrating manner, and the fixing pin penetrates through the first fixing hole and the second fixing hole and is inserted into the first strip-shaped hole; and/or a limiting boss is arranged on the hole wall of the second mounting hole, and the lower end face of the rotating ring is abutted to the upper end face of the limiting boss.

Furthermore, a plurality of first teeth are arranged on the upper end surface of the rotating ring and extend along the circumferential direction of the rotating ring; the vertebral body prosthesis further comprises a first screw plug, an angle adjusting hole is formed in the side wall of the height adjusting piece in a penetrating mode, and the first screw plug penetrates through the angle adjusting hole and is abutted to the first teeth.

Further, the height adjusting piece comprises a height adjusting cylinder and a height adjusting ring, the height adjusting ring is rotatably arranged in the vertebral body main body, the height adjusting ring is sleeved on the outer side of the height adjusting cylinder and is in threaded fit with the height adjusting cylinder, and the height adjusting cylinder is in rotation stopping fit with the vertebral body main body.

Further, the height adjusting piece still includes the spacer pin, is provided with the second bar hole of vertical extension on the lateral wall of a height adjusting section of thick bamboo, and the lateral wall of centrum main part runs through and is provided with spacing hole, and the spacer pin passes spacing hole and inserts and locate second bar hole.

Further, be provided with annular brace table and annular spacing platform on the pore wall of first mounting hole, annular brace table and annular spacing platform all extend along the circumference of centrum main part, the lateral wall of centrum main part runs through and is provided with open structure, the lower surface of annular spacing platform and open structure's upper surface looks parallel and level, annular brace table's upper surface and open structure's lower surface looks parallel and level, altitude mixture control ring passes open structure and sets up the upper surface at annular brace table, altitude mixture control ring's upper surface and the spacing cooperation of the lower surface of annular spacing platform.

Furthermore, a plurality of second teeth are arranged on the lower end surface of the height adjusting ring and extend along the circumferential direction of the height adjusting ring; the vertebral body prosthesis further comprises a second screw plug, a height adjusting hole extending along the radial direction is arranged in the vertebral body in a penetrating mode, and the second screw plug penetrates through the height adjusting hole and is abutted to the second teeth.

Furthermore, a plurality of lightening holes are arranged on the side wall of the vertebral body at intervals; porous layers are arranged on the upper surface of the upper end plate and the lower surface of the lower end plate; the upper surface of the upper end plate and the lower surface of the lower end plate are respectively provided with a plurality of protrusions which are arranged at intervals, and the plurality of protrusions are arranged on the porous layer; the upper end plate is provided with a bone grafting hole which extends vertically and penetrates through the upper surface of the upper end plate; the first hinge part and the second hinge part are respectively positioned at two sides of the axis of the height adjusting piece; the vertebral body prosthesis further comprises a connecting shaft, the first hinged portion is a first hinged shaft, the first hinged shaft is provided with a first hinged hole extending along the axial direction of the first hinged shaft, the second hinged portion is a second hinged shaft, the second hinged shaft is provided with a second hinged hole extending along the axial direction of the second hinged shaft, the third hinged portion is a third hinged hole, the fourth hinged portion is a fourth hinged hole, the connecting shaft penetrates through the third hinged hole and the first hinged hole, and the connecting shaft penetrates through the fourth hinged hole and the second hinged hole.

When the vertebral prosthesis needs to be used, the angle adjusting piece is placed in the second mounting hole of the height adjusting piece, the height adjusting piece is placed in the first mounting hole of the vertebral body, the third hinging part of the upper end plate is connected with the first hinging part of the height adjusting piece, the fourth hinging part of the upper end plate is connected with the second hinging part of the angle adjusting piece, the vertical position of the height adjusting piece in the first mounting hole is adjusted, the upper end plate and the lower end plate are respectively abutted against the corresponding adjacent vertebrae, the vertical position of the angle adjusting piece in the second mounting hole is adjusted, the fourth hinging part of the upper end plate can rotate relative to the third hinging part, the angle of the upper end plate relative to the lower end plate can be adjusted, and the upper end plate and the lower end plate can be attached to the corresponding adjacent vertebrae in a better physiological anatomy manner, and then can realize the vertebral plate angle that adapts to different human bodies through a centrum false body, need not a large amount of stock. And compared with the prior art that the titanium mesh needs to be cut, the steps of the operation are greatly simplified.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates an exploded view of a vertebral prosthesis provided in accordance with an embodiment of the present invention;

FIG. 2 shows an exploded view of the angle adjustment member and height adjustment barrel of FIG. 1;

FIG. 3 shows a schematic view of the lifter of FIG. 2;

FIG. 4 shows a schematic view of the height adjustment cartridge of FIG. 2;

FIG. 5 shows a schematic view of the rotating ring of FIG. 2;

FIG. 6 shows an assembly view of the angle adjustment member and height adjustment barrel of FIG. 1;

FIG. 7 illustrates a schematic structural view of the upper endplate of FIG. 1;

FIG. 8 illustrates a schematic structural view of the vertebral body of FIG. 1;

FIG. 9 illustrates yet another exploded view of a vertebral prosthesis provided in accordance with an embodiment of the present invention;

FIG. 10 illustrates an assembly view of the vertebral prosthesis provided in accordance with an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a vertebral body; 11. a lower endplate; 12. a first mounting hole; 121. an annular support table; 13. a limiting hole; 14. an open structure; 15. lightening holes; 16. a porous layer; 17. a protrusion; 18. bone grafting holes; 19. a height adjustment hole;

20. an adjustment assembly; 21. a height adjustment member; 211. a first hinge portion; 212. a second mounting hole; 213. a second fixing hole; 214. a height adjustment barrel; 2141. a second bar-shaped hole; 215. a height adjustment ring; 2151. a second tooth; 216. a spacing pin; 217. an angle adjusting hole; 22. an angle adjusting member; 221. a second hinge portion; 222. a rotating ring; 2221. a first tooth; 223. a lifting member; 2231. a first bar-shaped hole; 224. a limiting ring; 2241. a first fixing hole; 225. a fixing pin;

30. an upper endplate; 31. a third hinge; 32. a fourth hinge portion;

40. a first plug screw;

50. a second plug screw;

60. and (7) connecting the shafts.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in FIGS. 1-10, an embodiment of the present invention provides a vertebral body prosthesis comprising a vertebral body 10, an adjustment assembly 20, and an upper endplate 30. The lower end plate 11 is arranged at the lower end of the vertebral body 10, the vertebral body 10 is provided with a first mounting hole 12 arranged along the vertical direction, and the first mounting hole 12 penetrates through the upper end of the vertebral body 10. The adjusting assembly 20 comprises a height adjusting part 21 and an angle adjusting part 22, the height adjusting part 21 is vertically movably arranged in the first mounting hole 12 in a penetrating manner, a first hinge part 211 is arranged at the upper end of the height adjusting part 21, the first hinge part 211 extends out of the first mounting hole 12, the height adjusting part 21 is provided with a second mounting hole 212 which is vertically arranged, the second mounting hole 212 penetrates through the upper end of the height adjusting part 21, the angle adjusting part 22 is vertically movably arranged in the second mounting hole 212, a second hinge part 221 is arranged at the upper end of the angle adjusting part 22, the second hinge part 221 extends out of the second mounting hole 212, and the extending directions of the axes of the first hinge part 211 and the second hinge part 221 are the same. The upper end plate 30 is located above the height-adjusting member 21 and the angle-adjusting member 22, the upper end plate 30 has a third hinge portion 31 and a fourth hinge portion 32, the third hinge portion 31 is hinged to the first hinge portion 211, and the fourth hinge portion 32 is hinged to the second hinge portion 221.

By applying the technical scheme of the invention, the vertebral body prosthesis comprises a vertebral body 10, an adjusting component 20 and an upper end plate 30, when the vertebral body prosthesis needs to be used, an angle adjusting piece 22 is placed in a second mounting hole 212 of a height adjusting piece 21, the height adjusting piece 21 is placed in a first mounting hole 12 of the vertebral body 10, a third hinged part 31 of the upper end plate 30 is connected with a first hinged part 211 of the height adjusting piece 21, a fourth hinged part 32 of the upper end plate 30 is connected with a second hinged part 221 of the angle adjusting piece 22, the vertical position of the height adjusting piece 21 in the first mounting hole 12 is adjusted, so that the upper end plate 30 and the lower end plate 11 are respectively abutted against corresponding adjacent vertebrae, the vertical position of the angle adjusting piece 22 in the second mounting hole 212 is adjusted, the fourth hinged part 32 of the upper end plate 30 can rotate relative to the third hinged part 31, and further the angle of the upper end plate 30 relative to the lower end plate 11 can be adjusted, the upper end plate 30 and the lower end plate 11 are attached to the corresponding adjacent vertebrae in a better physiological anatomy manner, so that the vertebral plate angle adapting to different human bodies can be realized through one vertebral body prosthesis, and a large amount of stock is not needed. And compared with the prior art that the titanium mesh needs to be cut, the steps of the operation are greatly simplified.

The same direction of extension of the axes of the first hinge 211 and the second hinge 221 means that the same direction of extension of the axes of rotation is obtained after the first hinge 211 and the third hinge 31 are hinged and after the second hinge 221 and the fourth hinge 32 are hinged.

In the embodiment, the projections of the upper end plate 30 and the lower end plate 11 on the horizontal plane are both rectangular structures with four smooth corners, and by adopting the structures, the shapes of the upper end plate 30 and the lower end plate 11 can be consistent with the shapes of adjacent vertebral bodies, so that the use experience of a patient is enhanced.

In the embodiment, the vertebral body prosthesis can be adjusted in height through the height adjusting part 21, so that the vertebral body prosthesis can adapt to different anatomical physiological data, and can be implanted by forming a small incision on a human body.

As shown in fig. 2 to 6, the angle adjusting member 22 includes a rotating ring 222 and a lifting member 223, the rotating ring 222 is rotatably disposed in the second mounting hole 212, and the lifting member 223 is screw-engaged with the rotating ring 222 and is rotation-stopped with the height adjusting member 21. By adopting the angle adjusting part 22 with the structure, the rotary motion of the rotating ring 222 can be converted into the vertical linear motion of the lifting part 223, and the angle adjusting part has the advantages of simple structure and convenience in installation.

In this embodiment, since the lifting member 223 is in rotation-stopping fit with the height adjusting member 21, the lifting member 223 can only vertically move but cannot rotate under the threaded fit of the lifting member 223 and the rotating ring 222.

In the present embodiment, the rotating ring 222 has a cylindrical structure, and the first mounting hole 12 has a circular hole.

It should be noted that, through the mutual cooperation of the rotating ring 222 and the lifting member 223, the lifting member 223 can be vertically lifted or lowered, and further, the angle adjustment of the upper end plate 30 can be realized, and the angle adjustment range is between 0 to 20 °.

As shown in fig. 2, the angle adjusting member 22 further includes a limiting ring 224, the limiting ring 224 is sleeved on the outer side wall of the lifting member 223, the limiting ring 224 is located in the second mounting hole 212 and is in limiting fit with the height adjusting member 21, and the lower end surface of the limiting ring 224 abuts against the upper end surface of the rotating ring 222. The stop ring 224 can block the rotating ring 222, and further prevent the rotating ring 222 from moving upward, so that the rotating ring 222 can only rotate along its axis.

In the present embodiment, the stop collar 224 has a circular ring structure.

As shown in fig. 2 and 3, the angle adjusting member 22 further includes a fixing pin 225, the lifting member 223 is provided with a first bar-shaped hole 2231 extending vertically, a first fixing hole 2241 is provided on a side wall of the limiting ring 224 in a penetrating manner, a second fixing hole 213 is provided on a side wall of the height adjusting member 21 in a penetrating manner, the fixing pin 225 passes through the first fixing hole 2241 and the second fixing hole 213 and is inserted into the first bar-shaped hole 2231, the fixing pin 225 is adopted to form a fixing effect on the limiting ring 224, so that the limiting ring 224 can block the rotating ring 222 and form a rotation stopping fit on the lifting member 223, and the lifting member 223 cannot rotate and can only move along the first bar-shaped hole 2231 vertically and linearly.

Specifically, a limiting boss is disposed on a hole wall of the second mounting hole 212, and a lower end surface of the rotating ring 222 abuts against an upper end surface of the limiting boss. By adopting the matching of the limiting boss and the limiting ring 224, the rotating ring 222 can be limited at the lower part and the upper part in the vertical direction, so that the rotating ring 222 can only rotate along the axis of the rotating ring, but cannot move vertically.

As shown in fig. 5, the upper end surface of the rotating ring 222 is provided with a plurality of first teeth 2221, the plurality of first teeth 2221 extend along the circumferential direction of the rotating ring 222, and the rotating ring 222 can rotate along its axis by shifting the plurality of first teeth 2221, which has an advantage of simple structure.

The vertebral prosthesis further comprises a first screw plug 40, an angle adjusting hole 217 is formed in the side wall of the height adjusting piece 21 in a penetrating mode, and the first screw plug 40 is arranged in the angle adjusting hole 217 in a penetrating mode and abutted to the first teeth 2221. The angle adjusting hole 217 is used for facilitating adjustment of the first teeth 2221, and the first screw plug 40 is used for limiting the first teeth 2221 to prevent the rotating ring 222 from rotating continuously.

Specifically, a tool can be used to shift the first tooth 2221 through the angle adjustment hole 217, so as to rotate the rotation ring 222, and the rotation ring 222 can drive the lifting member 223 to move vertically, so as to rotate the fourth hinge portion 32 of the upper end plate 30 relative to the third hinge portion 31, so as to adjust the angle of the upper end plate 30 relative to the lower end plate 11. After the angle adjustment of the upper end plate 30 is completed, the first screw plug 40 can be abutted against the first teeth 2221 to limit the first teeth 2221, so as to prevent the rotating ring 222 from rotating continuously.

It should be noted that, because the lifting member 223 and the rotating ring 222 are in threaded fit, stepless adjustment of the height of the lifting member 223 can be realized under the condition of ensuring the adjustment stability, so that the adjustment process is smoother.

As shown in fig. 1, 4 and 10, the height adjusting member 21 includes a height adjusting cylinder 214 and a height adjusting ring 215, the height adjusting ring 215 is rotatably disposed in the vertebral body 10, the height adjusting ring 215 is disposed outside the height adjusting cylinder 214 and is in threaded engagement with the height adjusting cylinder 214, and the height adjusting cylinder 214 is in rotation-stopping engagement with the vertebral body 10. By adopting the height adjusting piece 21 with the structure, the rotary motion of the height adjusting ring 215 can be converted into the vertical linear motion of the height adjusting cylinder 214, and the height adjusting piece has the advantages of simple structure and convenience in installation.

In this embodiment, the height adjustment ring 215 is disposed within the vertebral body 10 such that the height adjustment ring 215 is prevented from moving vertically. The rotation-stopping fit of the height adjusting cylinder 214 and the vertebral body 10 is utilized to realize that the height adjusting cylinder 214 can only move vertically but can not rotate.

It should be noted that the height of the whole vertebral body can be adjusted by the mutual matching of the height adjusting cylinder 214 and the height adjusting ring 215, and the height adjusting range is 0-30 mm.

In the present embodiment, the height adjustment cylinder 214 is designed to have a cylindrical structure, the height adjustment ring 215 is designed to have an annular structure, and the vertebral body 10 is designed to have a cylindrical structure.

As shown in fig. 1, 4 and 8, the height adjusting member 21 further includes a limiting pin 216, a second strip-shaped hole 2141 extending vertically is disposed on the sidewall of the height adjusting cylinder 214, a limiting hole 13 is disposed through the sidewall of the vertebral body 10, and the limiting pin 216 passes through the limiting hole 13 and is inserted into the second strip-shaped hole 2141. The height adjusting cylinder 214 can be connected with the vertebral body 10 by the limit pin 216, so as to block the height adjusting cylinder 214, so that the height adjusting cylinder 214 cannot rotate and can only move along the extending direction of the second strip-shaped hole 2141.

As shown in fig. 8 and 10, an annular supporting platform 121 and an annular limiting platform are disposed on the hole wall of the first mounting hole 12, the annular supporting platform 121 and the annular limiting platform both extend along the circumferential direction of the vertebral body 10, the side wall of the vertebral body 10 is provided with an opening structure 14 in a penetrating manner, the lower surface of the annular limiting platform is flush with the upper surface of the opening structure 14, the upper surface of the annular supporting platform 121 is flush with the lower surface of the opening structure 14, the height adjusting ring 215 passes through the opening structure 14 and is erected on the upper surface of the annular supporting platform 121, and the upper surface of the height adjusting ring 215 is in limit fit with the lower surface of the annular limiting platform. The height adjustment ring 215 is mounted into the vertebral body 10 through the opening structure 14, the height adjustment ring 215 is supported by the annular support table 121, and the height adjustment ring 215 is limited by the annular limiting table, preventing the height adjustment ring 215 from moving in the vertical direction.

In this embodiment, since the lower surface of the annular position limiting table is flush with the upper surface of the opening structure 14, and the upper surface of the annular support table 121 is flush with the lower surface of the opening structure 14, the jerking feeling during the installation and rotation of the height adjusting ring 215 can be reduced, so that the rotation of the height adjusting ring 215 is smoother.

As shown in fig. 10, the height adjustment ring 215 is provided at a lower end surface thereof with a plurality of second teeth 2151, the plurality of second teeth 2151 extend in a circumferential direction of the height adjustment ring 215, and the height adjustment ring 215 can be rotated along its axis by turning the plurality of second teeth 2151, which has an advantage of simple structure.

And, the vertebral body prosthesis further includes a second plug screw 50, the vertebral body 10 is provided with a height adjustment hole 19 extending along the radial direction, and the second plug screw 50 is arranged through the height adjustment hole 19 and abuts against the plurality of second teeth 2151. Adopt height adjustment hole 19, be convenient for adjust second tooth 2151, adopt second plug screw 50 can form limiting displacement to second tooth 2151, avoid altitude mixture control ring 215 to continue to rotate.

Specifically, the second tooth 2151 can be shifted through the height adjusting hole 19 by using a tool, so that the height adjusting ring 215 can be rotated, and the height adjusting cylinder 214 can be driven to vertically move through the height adjusting ring 215, so that the height adjustment of the vertebral body prosthesis can be realized. After the height adjustment of the vertebral prosthesis is completed, the second screw plug 50 can be used to abut against the second tooth 2151 to limit the second tooth 2151 and prevent the height adjustment ring 215 from continuing to rotate.

As shown in fig. 8, a plurality of lightening holes 15 are arranged on the side wall of the vertebral body 10 at intervals, and the lightening holes 15 can reduce the weight of the vertebral body 10, so that the installation is convenient, and the adjacent vertebral bodies are not subjected to too large bearing force, thereby reducing the damage to the vertebral bodies of the human body.

In the embodiment, the upper surface of the upper end plate 30 and the lower surface of the lower end plate 11 are both provided with the porous layers 16, and the porous layers 16 can realize high matching fit and bony fusion with the end plate surface of the human vertebra, so that the height stability after vertebral prosthesis replacement is ensured, and the collapse rate after surgery is reduced.

It should be noted that, the upper surface of the upper end plate 30 and the lower surface of the lower end plate 11 both have a plurality of protrusions 17 arranged at intervals, and the plurality of protrusions 17 are all arranged on the porous layer 16, so that the stability of initial fixation can be increased by using the plurality of protrusions 17, and the purpose of long-term fixation after long-term bone ingrowth can be achieved.

In the present embodiment, the protrusion 17 is provided as a tapered protrusion.

And, the upper end plate 30 is provided with the bone grafting hole 18 that extends vertically, and the bone grafting hole 18 runs through the upper surface of upper end plate 30, adopts bone grafting hole 18 to carry out bone implantation, makes bone grafting and human skeleton form the integration, realizes better long-term stability.

In the present embodiment, the first hinge portion 211 and the second hinge portion 221 are respectively located at two sides of the axis of the height adjusting member 21, so that the position distance of the upper end plate 30 on the first hinge portion 211 and the second hinge portion 221 can be further increased, and a wider range of angle adjustment of the upper end plate 30 can be realized.

It should be noted that the vertebral body prosthesis further includes a connecting shaft 60, the first hinge portion 211 is a first hinge shaft, the first hinge shaft has a first hinge hole extending along an axial direction thereof, the second hinge portion 221 is a second hinge shaft, the second hinge shaft has a second hinge hole extending along an axial direction thereof, the third hinge portion 31 is a third hinge hole, the fourth hinge portion 32 is a fourth hinge hole, the connecting shaft 60 is disposed through the third hinge hole and the first hinge hole, and the connecting shaft 60 is disposed through the fourth hinge hole and the second hinge hole. The upper end plate is hinged with the vertebral body 10 and the lifting piece 223 by the connecting shaft 60, and the device has the advantages of simple structure and convenience in adjustment.

In this embodiment, the first hinge shaft and the second hinge shaft are both embedded in the upper end plate 30, so that the first hinge shaft and the second hinge shaft can be protected, and the stability of the vertebral prosthesis is improved.

The vertebral body prosthesis provided by the invention is made of medical metal, the medical metal comprises but is not limited to titanium and titanium alloy, cobalt alloy, stainless steel, tantalum metal and magnesium alloy, the metal materials are specified in the international standard of ISO-5830 series, and the biocompatibility of the metal materials is proved by years of domestic and foreign practice of orthopedic implantation application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertebral prosthesis, comprising:

the lower end plate (11) is arranged at the lower end of the vertebral body (10), the vertebral body (10) is provided with a first mounting hole (12) which is vertically arranged, and the first mounting hole (12) penetrates through the upper end of the vertebral body (10);

an adjustment assembly (20) comprising a height adjustment member (21) and an angle adjustment member (22), the height adjusting piece (21) is vertically movably arranged in the first mounting hole (12) in a penetrating way, the upper end of the height adjusting piece (21) is provided with a first hinge part (211), the first hinge part (211) extends out of the first mounting hole (12), the height adjusting piece (21) is provided with a second mounting hole (212) which is vertically arranged, the second mounting hole (212) penetrates through the upper end of the height adjusting piece (21), the angle adjusting piece (22) is vertically movably arranged in the second mounting hole (212), the upper end of the angle adjusting piece (22) is provided with a second articulated part (221), the second hinge part (221) extends out of the second mounting hole (212), and the extension directions of the axes of the first hinge part (211) and the second hinge part (221) are the same;

an upper end plate (30) located above the height adjusting member (21) and the angle adjusting member (22), the upper end plate (30) having a third hinge portion (31) and a fourth hinge portion (32), the third hinge portion (31) being hinged to the first hinge portion (211), the fourth hinge portion (32) being hinged to the second hinge portion (221).

2. The vertebral body prosthesis of claim 1 wherein said angle adjustment member (22) includes a rotating ring (222) and a lifting member (223), said rotating ring (222) being rotatably disposed within said second mounting hole (212), said lifting member (223) being threadably engaged with said rotating ring (222) and being in a rotation-stop engagement with said height adjustment member (21).

3. The vertebral prosthesis according to claim 2, characterized in that the angle adjusting member (22) further comprises a limiting ring (224), the limiting ring (224) is sleeved on the outer side wall of the lifting member (223), the limiting ring (224) is positioned in the second mounting hole (212) and is in limiting fit with the height adjusting member (21), and the lower end surface of the limiting ring (224) abuts against the upper end surface of the rotating ring (222).

4. The vertebral body prosthesis of claim 3,

the angle adjusting piece (22) further comprises a fixing pin (225), the lifting piece (223) is provided with a first strip-shaped hole (2231) extending vertically, a first fixing hole (2241) penetrates through the side wall of the limiting ring (224), a second fixing hole (213) penetrates through the side wall of the height adjusting piece (21), and the fixing pin (225) penetrates through the first fixing hole (2241) and the second fixing hole (213) and is inserted into the first strip-shaped hole (2231); and/or the presence of a gas in the gas,

the hole wall of the second mounting hole (212) is provided with a limiting boss, and the lower end face of the rotating ring (222) is abutted against the upper end face of the limiting boss.

5. The vertebral body prosthesis of claim 2,

a plurality of first teeth (2221) are arranged on the upper end surface of the rotating ring (222), and the first teeth (2221) extend along the circumferential direction of the rotating ring (222);

the vertebral body prosthesis further comprises a first screw plug (40), an angle adjusting hole (217) is formed in the side wall of the height adjusting piece (21) in a penetrating mode, and the first screw plug (40) penetrates through the angle adjusting hole (217) and is abutted to the first teeth (2221).

6. The vertebral body prosthesis according to any of the claims 1 to 5, characterized in that the height adjustment member (21) comprises a height adjustment barrel (214) and a height adjustment ring (215), the height adjustment ring (215) being rotatably disposed within the vertebral body (10), the height adjustment ring (215) being sleeved outside the height adjustment barrel (214) and being in threaded engagement with the height adjustment barrel (214), and the height adjustment barrel (214) being in rotation-stop engagement with the vertebral body (10).

7. The vertebral body prosthesis according to claim 6, wherein the height adjusting piece (21) further comprises a limiting pin (216), a second strip-shaped hole (2141) extending vertically is formed in the side wall of the height adjusting cylinder (214), a limiting hole (13) is formed in the side wall of the vertebral body (10) in a penetrating manner, and the limiting pin (216) penetrates through the limiting hole (13) and is inserted into the second strip-shaped hole (2141).

8. The vertebral body prosthesis according to claim 6, characterized in that an annular support platform (121) and an annular limit platform are arranged on the wall of the first mounting hole (12), the annular support platform (121) and the annular limit platform both extend along the circumferential direction of the vertebral body (10), an opening structure (14) is arranged on the side wall of the vertebral body (10) in a penetrating manner, the lower surface of the annular limit platform is flush with the upper surface of the opening structure (14), the upper surface of the annular support platform (121) is flush with the lower surface of the opening structure (14), the height adjusting ring (215) passes through the opening structure (14) and is erected on the upper surface of the annular support platform (121), and the upper surface of the height adjusting ring (215) is in limit fit with the lower surface of the annular limit platform.

9. The vertebral body prosthesis of claim 6,

a plurality of second teeth (2151) are arranged on the lower end face of the height adjusting ring (215), and the second teeth (2151) extend along the circumferential direction of the height adjusting ring (215);

the vertebral body prosthesis further comprises a second screw plug (50), a height adjusting hole (19) extending along the radial direction is formed in the vertebral body main body (10) in a penetrating mode, and the second screw plug (50) penetrates through the height adjusting hole (19) and is abutted to the second teeth (2151).

10. The vertebral body prosthesis of claim 1,

a plurality of lightening holes (15) are arranged on the side wall of the vertebral body (10) at intervals;

the upper surface of the upper end plate (30) and the lower surface of the lower end plate (11) are both provided with a porous layer (16);

the upper surface of the upper end plate (30) and the lower surface of the lower end plate (11) are respectively provided with a plurality of protrusions (17) which are arranged at intervals, and the plurality of protrusions (17) are respectively arranged on the porous layer (16);

the upper end plate (30) is provided with a bone grafting hole (18) extending vertically, and the bone grafting hole (18) penetrates through the upper surface of the upper end plate (30);

the first hinge part (211) and the second hinge part (221) are respectively positioned at two sides of the axis of the height adjusting piece (21);

the vertebral body prosthesis further comprises a connecting shaft (60), the first hinge portion (211) is a first hinge shaft, the first hinge shaft is provided with a first hinge hole extending along the axial direction of the first hinge shaft, the second hinge portion (221) is a second hinge shaft, the second hinge shaft is provided with a second hinge hole extending along the axial direction of the second hinge shaft, the third hinge portion (31) is a third hinge hole, the fourth hinge portion (32) is a fourth hinge hole, the connecting shaft (60) penetrates through the third hinge hole and the first hinge hole, and the connecting shaft (60) penetrates through the fourth hinge hole and the second hinge hole.