Occipital bone fixing assembly for occipitocervical fusion

Abstract

The invention discloses an occipital bone fixing assembly for occipitocervical fusion. The occipital bone fixing assembly comprises a screw rod part, a fixing plug and a screwing nut, wherein a clamping member is arranged at the bottom end of the screw rod part and is connected with the screw rod part, a skeletal pore is formed in a relatively thick position of occipital bone, a snap-fit part penetrates through the skeletal pore and is fixedly connected with the occipital bone through being matched with the fixing plug and the screwing nut; the fixing plug comprises a plug hole, an upper disk cap and a lower plug tube; the upper disk cap and the lower plug tube are formed through integrated molding and are colinear in centerline, the plug hole runs through the upper disk cap and the lower plug tube, the lower plug tube is a hollow tube and can be applied to graft bone, circular small holes are distributed in the sidewall of the tube, and fusion between the graft bone and the skeletal pore of the occipital bone is facilitated; and the bottom clamping member of the screw rod is in contact with an inner plate of the occipital bone, the lower surface of the screwing nut is in contact with the upper disk cap, the lower surface of the upper disk cap is in contact with an outer plate of the occipital bone and is abutted against the outer plate of the occipital bone along with screwing of the screwing nut, globally, the screw rod part is tightly fixed onto the occipital bone to achieve the aim of fixing, and this connection mode is of up-and-down clamped fixing, so that stress volume of the occipital bone to the fixing assembly is larger.

Description

Technical field[0001]The present invention relates to the field of medical devices, and in particular, to a pillowcase fusion pillow fixing assembly.Background technique[0002]In terms of pillow bone fixation of pillowcase, the existing fixed manner is fixed by screws. In terms of fixed stability, since the effect of the head and neck movement is often unplugged, fixed is easy to fail after fixation.[0003]After the screw spur bone tissue, the screw thread is mainly fixed with the bone body, wherein the screw, the screw and the depth of screw, and the degree of rotation of the osteoporosis affect the fixing effect, and the screw fix itself is: thread structure and bone The body anti-discharge volume contact surface is small; at the same time, since the deformation of the rigid contact, it will destroy the bone, which ultimately causes the definition.Inventive content[0004]In response to the above problem, this program proposes a pillowcase fusion pillow fixing assembly; when the prior...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, this program proposes a occipital bone fixation assembly for occipital-cervical fusion; it solves the problem that in the prior art, when the occipital bone is fixed with screws, it is often pulled out due to the influence of movement, and the fixation is prone to failure.

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