CN117814964A - Vertebral body prosthesis - Google Patents

Abstract

The present invention provides a vertebral body prosthesis comprising: the cone plate is provided with a first conical surface, a first ball socket with a conical top and a second ball socket with a conical surface; the cone body is provided with a second conical surface and a first ball head of a conical top thereof, and is also provided with an internal transverse cavity and an internal longitudinal cavity; the adjusting mechanism is provided with an elastic element for connecting the vertebral plate and the vertebral body, a first knob, a fork-shaped part and a linkage column which are inserted in the transverse tilting cavity, and a second knob which is inserted in the longitudinal tilting cavity, and the fork-shaped part and the linkage column are movably arranged in the transverse tilting cavity. By applying the technical scheme of the invention, the vertebral body prosthesis comprises: the vertebral plate, the vertebral body and the adjusting mechanism can adjust the front-back inclination angle and the left-right inclination angle of the vertebral body to match osteotomy surfaces of different angles in the process of implanting the vertebral body prosthesis, so that the implanted vertebral body prosthesis is more matched with the osteotomy surfaces.

Description

A vertebral prosthesis

Technical Field

The present invention relates to the field of artificial prostheses, and in particular to a vertebral prosthesis.

Background technique

The human spine can be damaged by illness or external forces, such as vertebral tumors, severe comminuted fractures, and infectious diseases such as tuberculosis, which may cause spinal cord and nerve damage or vertebral collapse and angular deformity of the spine. Patients with obvious neurological dysfunction or angular deformity often need vertebrae resection. The appearance of artificial vertebrae provides a more reliable treatment method for patients with spinal tumors, spinal tuberculosis and trauma.

During vertebral resection, in order to preserve as much of the vertebral body as possible or due to inevitable human errors during the surgical operation, the upper and lower osteotomy surfaces of the spine are often not completely parallel, making it difficult for the implanted vertebral prosthesis to fit the osteotomy surface.

The main purpose of the present invention is to provide a vertebral prosthesis to solve the problem in the prior art that the vertebral prosthesis is difficult to fit the osteotomy surfaces of the spine with different inclination angles.

Summary of the invention

In order to achieve the above-mentioned purpose, the present invention provides a vertebral prosthesis, comprising: a vertebral plate, a first ball socket having a first conical surface and a conical top and a second ball socket on the conical surface; a vertebral body, a first ball head having a second conical surface and a conical top, and also having an internal transverse tilt cavity and a longitudinal tilt cavity; an adjustment mechanism, comprising an elastic element connecting the vertebral plate and the vertebral body, a first knob, a fork-shaped portion and a linkage column inserted in the transverse tilt cavity, and a second knob inserted in the longitudinal tilt cavity, the fork-shaped portion and the linkage column being movably arranged in the transverse tilt cavity.

Furthermore, the apex of the first conical surface, the apex of the second conical surface, the center of the first ball head, and the center of the first ball socket are located at the same point.

Furthermore, the elastic element is a tensile element, which connects the vertebral plate and the vertebral body and provides tension.

Furthermore, the first knob comprises a first operating portion, a coaxial shaft, and a gear portion, the axes of which are colinear, and the first knob is rotatably and movably arranged in the tilt cavity.

Furthermore, the second knob has a second operating portion protruding from the cone and an internal thread at the center, and the second knob is rotatably arranged in the trim cavity.

Furthermore, the fork-shaped part is provided with a rotating hole for carrying the coaxial shaft and a notch for inserting the gear part, and the bottom is provided with an external thread that matches the internal thread of the second knob, and the fork-shaped part is movably arranged in the transverse tilt cavity.

Furthermore, the linkage column is provided with a second ball head abutting against the second ball socket and a rack portion meshing with the gear portion, and the linkage column is movably arranged in the transverse tilt cavity.

Furthermore, there are at least two linkage columns, which are arranged in parallel on both sides of the gear portion.

Furthermore, the diameter of the second ball socket is greater than the diameter of the second ball head.

Furthermore, a rotating shaft portion is provided on the inner wall of the transverse tilt cavity and penetrates the vertebral body outwardly, and the coaxial shaft is rotatably and movably arranged in the transverse tilt cavity.

Using the technical solution of the present invention, a vertebral prosthesis includes: a vertebral plate, a first ball socket with a first cone surface and its cone top, and a second ball socket on the cone surface; a vertebral body, a first ball head with a second cone surface and its cone top, and an internal transverse tilt cavity and longitudinal tilt cavity; an adjustment mechanism, an elastic element connecting the vertebral plate and the vertebral body, a first knob, a fork-shaped portion, and a linkage column inserted in the transverse tilt cavity, and a second knob inserted in the longitudinal tilt cavity, the fork-shaped portion and the linkage column are movably arranged in the transverse tilt cavity. During the implantation of the vertebral prosthesis, the anterior-posterior tilt angle and the left-right tilt angle of the vertebral body can be adjusted to match the osteotomy surfaces of different angles, so that the implanted vertebral prosthesis is more in line with the osteotomy surface.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 shows an exploded view of a vertebral prosthesis according to the present invention;

FIG2 shows a cross-sectional view of a vertebral prosthesis according to the present invention;

FIG3 is a schematic diagram showing the structure of a vertebral plate of a vertebral prosthesis according to the present invention;

FIG4 shows a cross-sectional view of a vertebral body of a vertebral prosthesis according to the present invention;

FIG5 shows a cross-sectional view of a first knob of a vertebral prosthesis according to the present invention;

FIG6 shows a cross-sectional view of the fork portion of the vertebral prosthesis according to the present invention;

FIG. 7 is a schematic structural diagram of a rack of a vertebral prosthesis according to the present invention.

The above drawings include the following reference numerals:

10. vertebral plate; 11. first conical surface; 12. first ball socket; 13. second ball socket; 20. adjustment mechanism; 21. elastic element; 22. first knob; 221. first operating part; 222. concentric axis; 223. gear part; 23. second knob; 231. second operating part; 232. internal thread; 24. fork-shaped part; 241. rotating hole; 242. notch; 243. external thread; 25. linkage column; 251. second ball head; 252. rack part; 30. vertebral body; 31. second conical surface; 32. first ball head; 33. transverse tilt cavity; 331. rotating shaft part; 34. longitudinal tilt cavity.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in Figures 1 to 7, the present invention provides a vertebral prosthesis, including: a vertebral plate 10, a first ball socket 12 having a first conical surface 11 and a conical top thereof, and a second ball socket 13 on the conical surface; a vertebral body 30, a first ball head 32 having a second conical surface 31 and a conical top thereof, and also having an internal transverse tilt cavity 33 and a longitudinal tilt cavity 34; an adjustment mechanism 20, comprising an elastic element 21 connecting the vertebral plate 10 and the vertebral body 30, a first knob 22, a fork-shaped portion 24 and a linkage column 25 inserted in the transverse tilt cavity 33, and a second knob 23 inserted in the longitudinal tilt cavity 34, wherein the fork-shaped portion 24 and the linkage column 25 are movably arranged in the transverse tilt cavity 33.

As shown in Figures 2 and 3, the apex of the first conical surface 11, the apex of the second conical surface 31, the center of the first ball head 32, and the center of the first ball socket 12 are located at the same point, ensuring that the vertebral plate 10 rotates around the same rotation center during the adjustment process.

In this embodiment, the elastic element 21 is a tensile element, which connects the vertebral plate 10 and the vertebral body 30 and provides a tensile force so that the vertebral plate 10 is closely attached to the vertebral body 30 .

As shown in Figures 2 and 5, the first knob 22 has a first operating part 221, a concentric shaft 222, and a gear part 223 with colinear axes. The first knob 22 is rotatably and movably arranged in the transverse tilt cavity 33. Rotating the first operating part 221 drives the gear part 223 to rotate in the notch 242 of the fork-shaped part 24.

As shown in FIGS. 1 and 4 , the second knob 23 has a second operating portion 231 protruding from the vertebral body 30 and a central internal thread 232 . The second knob 23 is rotatably disposed in the longitudinal tilt cavity 34 . Rotating the second knob 23 drives the fork-shaped portion 24 to move up and down to adjust the front-back tilt angle of the vertebral plate 10 .

As shown in Figures 2 and 6, the fork-shaped portion 24 is provided with a rotating hole 241 that carries the coaxial shaft 222, a notch 242 for inserting the gear portion 223, and an external thread 243 at the bottom that cooperates with the internal thread 232 of the second knob 23. The fork-shaped portion 24 is movably arranged in the transverse tilt cavity 33.

As shown in Figures 1 and 7, the linkage column 25 is provided with a second ball head 251 abutting against the second ball socket 13 and a rack portion 252 meshing with the gear portion 223. The linkage column 25 is movably arranged in the transverse tilt cavity 33. The rotation of the gear portion 223 can drive the linkage column 25 to move up and down in the transverse tilt cavity 33 to adjust the left and right inclination angles of the vertebral plate 10.

In particular, there are at least two linkage columns 25 , which are arranged in parallel on both sides of the gear portion 223 .

As shown in FIG. 2 , the diameter of the second ball socket 13 is larger than the diameter of the second ball head 251 . When the vertebral plate 10 has an inclination angle, the second ball head 251 can slide in the second ball socket 13 without generating stress, thereby improving the stability of the vertebral prosthesis.

As shown in FIG. 2 and FIG. 4 , a rotating shaft portion 331 is provided on the inner wall of the transverse tilting cavity 33 and penetrates the vertebral body 30 outwardly. The coaxial shaft 222 is rotatably and movably disposed in the transverse tilting cavity 33 .

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and/or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and/or combinations thereof.

In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

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

Claims (10)

1. A vertebral prosthesis, comprising: A vertebral plate (10) having a first conical surface (11), a first ball socket (12) at the top of the cone, and a second ball socket (13) on the conical surface; The cone body (30) has a second cone surface (31) and a first ball head (32) at the top of the cone, and also has an internal transverse tilt cavity (33) and a longitudinal tilt cavity (34); The adjustment mechanism (20) comprises an elastic element (21) connecting the vertebral plate (10) and the vertebral body (30), a first knob (22), a fork-shaped portion (24) and a linkage column (25) inserted in the roll cavity (33), and a second knob (23) inserted in the pitch cavity (34), wherein the fork-shaped portion (24) and the linkage column (25) are movably arranged in the roll cavity (33). 2. The vertebral prosthesis according to claim 1, characterized in that the apex of the first conical surface (11), the apex of the second conical surface (31), the center of the first ball head (32), and the center of the first ball socket (12) are located at the same point. 3. The vertebral prosthesis according to claim 1, characterized in that the elastic element (21) is a tensile element, connecting the vertebral plate (10) and the vertebral body (30) and providing tension. 4. The vertebral prosthesis according to claim 1, characterized in that the first knob (22) comprises a first operating portion (221), a coaxial shaft (222), and a gear portion (223) with colinear axes, and the first knob (22) is rotatably and movably arranged in the transverse tilt cavity (33). 5. The vertebral prosthesis according to claim 1, characterized in that the second knob (23) has a second operating portion (231) protruding from the vertebral body (30) and a central internal thread (232), and the second knob (23) is rotatably disposed in the trim cavity (34). 6. The vertebral prosthesis according to claim 1 is characterized in that the fork-shaped portion (24) is provided with a rotating hole (241) for carrying the coaxial shaft (222), a notch (242) for inserting the gear portion (223), and an external thread (243) is provided at the bottom to cooperate with the internal thread (232) of the second knob (23), and the fork-shaped portion (24) is movably arranged in the transverse tilt cavity (33). 7. The vertebral prosthesis according to claim 1, characterized in that the linkage column (25) is provided with a second ball head (251) abutting against the second ball socket (13) and a rack portion (252) meshing with the gear portion (223), and the linkage column 25 is movably arranged in the transverse tilt cavity (33). 8. The vertebral prosthesis according to claim 1, characterized in that there are at least two linkage columns (25) which are arranged in parallel on both sides of the gear portion (223). 9. The vertebral prosthesis according to claim 1, characterized in that the diameter of the second ball socket (13) is greater than the diameter of the second ball head (251). 10. The vertebral prosthesis according to claim 1, characterized in that a rotating shaft portion (331) is provided on the inner wall of the transverse cavity (33) and penetrates the vertebral body (30) outwardly, and the coaxial shaft (222) is rotatably and movably arranged in the transverse cavity (33).