DISC PROSTHESIS FOR CERVICAL VERTEBRA HAVING ELASTICITY SIMILAR TO THAT OF BONE TISSUE

Abstract

The present disclosure discloses a disc prosthesis for cervical vertebra having elasticity similar to that of bone tissue, and includes: a first support frame having a square shape; a second support frame formed to face the first support frame and spaced apart at a distance; and a mesh member integrally installed between the first support frame and the second support frame, wherein a first flange for supporting a fixing bolt is integrally formed on one side of the first support frame, and a second flange for supporting a fixing bolt is integrally formed on one side of the second support frame.

Claims

1. A disc prosthesis for cervical vertebra comprising: a first support frame having a square shape; a second support frame formed to face the first support frame and spaced apart at a distance; and a mesh member integrally installed between the first support frame and the second support frame, wherein a first flange for supporting a fixing bolt is integrally formed on one side of the first support frame, and a second flange for supporting a fixing bolt is integrally formed on one side of the second support frame.

2. The disc prosthesis for cervical vertebra of claim 1, wherein the first flange is formed with a first coupling hole into which the fixing bolt is inserted, and the second flange is formed with a second coupling hole into which the fixing bolt is inserted.

3. The disc prosthesis for cervical vertebra of claim 1, wherein the mesh member has a structure in which a plurality of star-shaped unit pieces are gathered to form a mesh structure, and has a structure capable of increasing the bondability with a living tissue while maintaining an elastic force.

4. The disc prosthesis for cervical vertebra of claim 1, wherein the first flange and the second flange are positioned at a corner portion of edge of a cervical vertebra bone.

5. The disc prosthesis for cervical vertebra of claim 4, wherein the fixing bolts inserted into the first coupling hole of the first flange and the second coupling hole of the second flange are inserted in a diagonal direction from the corner portion of edge of the cervical vertebra bone.

6. The disc prosthesis for cervical vertebra of claim 1, wherein the disc prosthesis is molded by 3D-printing using a 3D-printed titanium material.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG. 1 is a view showing a disc prosthesis for cervical vertebra according to the related art.

[0028] FIGS. 2a to 2c are views showing an installation state of the disc prosthesis for cervical vertebra according to the related art.

[0029] FIGS. 3A to 3C are schematic diagrams of a usage state of a disc prosthesis for cervical vertebra according to the present disclosure.

[0030] FIG. 4 is a front perspective view of the disc prosthesis for cervical vertebra according to the present disclosure.

[0031] FIG. 5 is a side perspective view of the disc prosthesis for cervical vertebra according to the present disclosure.

[0032] FIG. 6 is a plan perspective view of the disc prosthesis for cervical vertebra according to the present disclosure.

[0033] FIG. 7 is a perspective view showing a usage state of the disc prosthesis for cervical vertebra according to the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Hereinafter, a disc prosthesis for cervical vertebra according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0035] FIGS. 3A to 3C are schematic diagrams of a usage state of a disc prosthesis for cervical vertebra according to the present disclosure, FIG. 4 is a front perspective view of the disc prosthesis for cervical vertebra according to the present disclosure, FIG. 5 is a side perspective view of the disc prosthesis for cervical vertebra according to the present disclosure, and FIG. 6 is a plan perspective view of the disc prosthesis for cervical vertebra according to the present disclosure.

[0036] As shown in FIGS. 3A to 3C, a disc prosthesis for cervical vertebra 1 according to the present disclosure is installed between cervical vertebra bones 5, and is fixed by a fixing bolt 30 inserted through a first flange 11 and a second flange 21.

[0037] According to the present disclosure, the first flange 11 and the second flange 21 are positioned at a corner portion of edge of the cervical vertebra bone 5, and the fixing bolt 30 inserted through the respective flanges may travel diagonally from the corner portion, which is the strongest portion of the cervical vertebra bone 5. Since the fixing bolt 30 is inserted as described above, its length may be increased to use, and accordingly, a coupling force between the disc prosthesis 1 and the cervical vertebra bone 5 may be significantly increased.

[0038] The disc prosthesis for cervical vertebra 1 according to the present disclosure may be manufactured by 3D-printing using a 3D-printed titanium material. Accordingly, elasticity is similar to that of bone tissue so that it does not penetrate into the bone, and at the same time, it is possible to obtain an effect of being able to couple well to the bone by significantly improving bone surface engraftment.

[0039] As shown in FIGS. 4 to 6, the disc prosthesis for cervical vertebra 1 according to the present disclosure includes a first support frame 10 having a rectangular shape, a second support frame 20 formed to be separated at a distance so as to face the first support frame 10, and a mesh member 40 integrally installed between the first support frame 10 and the second support frame 20.

[0040] The first flange 11 for supporting the fixing bolt 30 is integrally formed on one side of the first support frame 10, and the second flange 21 for supporting another fixing bolt 30 is also integrally formed on one side of the second support frame 20. In addition, a first coupling hole 13 into which the fixing bolt 30 is inserted is formed in the first flange 11, and a second coupling hole 23 into which another fixing bolt 30 is inserted is formed in the second flange 21.

[0041] The first support frame 10, the mesh member 40, and the second support frame 20 are all integrally formed and connected to each other.

[0042] The mesh member 40 has a structure in which a plurality of star-shaped unit pieces are gathered to form a mesh structure, and has a structure capable of increasing the bondability with a living tissue while maintaining an elastic force.

[0043] Since the fixing force may be sufficiently increased by using the screw and the flange of the disk prosthesis, a structure having a sharp teeth shape that existed to increase a frictional force on upper and lower surfaces has been significantly reduced. The mesh structure as described above may increase a contact area between the bone tissue and the prosthesis at an initial stage and may disperse pressure applied to the bone tissue at the initial stage, thereby further reducing a subsidence phenomenon.

[0044] FIG. 7 is a perspective view showing a usage state of the disc prosthesis for cervical vertebra according to the present disclosure.

[0045] As shown in FIG. 7, a pair of fixing bolts 30 may be inserted into the cervical vertebra bone 5 through the first coupling hole 13 of the first flange 11 and the second coupling hole 23 of the second flange 21.

[0046] FIG. 8 shows the usage state for this. Referring to FIG. 8, the fixing bolt 30 is inserted in a diagonal direction from the corner portion of edge of the cervical vertebra bone 5, so that a long screw may be used to significantly improve the coupling force thereof without being in contact with a nerve portion positioned at rear of the cervical vertebra bone 5.

[0047] The present disclosure may function as described above because each flange may be positioned at the corner portion of edge of the cervical vertebra bone 5 by providing the first flange 11 and the second flange 21.

[0048] Those skilled in the art to which the present disclosure with the above contents pertains can understand that the present disclosure can be implemented in other specific forms without changing the technical spirit or essential features of the present disclosure. Therefore, the embodiments described above should be understood as being exemplary in all respects and not limiting.

DESCRIPTION OF REFERENCE NUMERALS

[0049]

TABLE-US-00001  1: Disc prosthesis  5: Cervical vertebra bone 10: First support frame 11: First flange 13: First coupling hole 20: Second support frame 21: Second flange 23: Second coupling hole 30: Fixing bolt 40: Mesh member