An occipital bone fixation component for occipital-cervical fusion
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A technology for fixing components and occipital bones, which is applied in the field of medical devices, can solve problems such as easy failure of fixation, and achieve the effect of large force-bearing volume
Active Publication Date: 2022-01-04
XIANGYA HOSPITAL CENT SOUTH UNIV
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Abstract
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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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Embodiment 1
[0027] see Figure 1~6 , the present invention provides a technical solution:
[0028] An occipital bone fixation assembly for occipital-cervical fusion, comprising a screw part 2, a fixing plug 3 and a tightening nut 4; the bottom end of the screw part 2 is provided with a clamping part 5, and the clamping part 5 is connected with the screw part 2, through Drill the bone hole 11 at the thicker part of the occipital bone, so that the clamping part passes through the bone hole and cooperates with the fixing plug 3 and the tightening nut 4 to be fixedly connected to the occipital bone.
[0029] The diameter of the bone hole 11 is not smaller than the size of the clamping part 5, so that the clamping part 5 can be set through the bone hole 11, and the clamping part 5 and the screw part 2 can be integrally formed, or can be clamped, Fixed connection by screw connection, welding, etc.;
[0030] The fixed plug 3 includes a plug hole 31, an upper disc cap 32 and a lower plug tube 3...
Embodiment 2
[0037] Based on the above embodiment, this solution is similar to Embodiment 1, the difference is that the plug hole 31 is eccentrically arranged in the fixed plug 3;
[0038] When the lower plug cylinder 33 is placed in the bone hole 11, the contact area between the clamping part 5 and the surface of the occipital inner plate is limited. In order to increase the contact area between the clamping part 5 and the surface of the occipital inner plate, the clamping part 5 is placed in the It can be more stable in the later stage of fixation, and the plug hole 31 is set eccentrically. When the lower plug tube 33 is fixed in the bone hole 11, the clamping part 5 will move more eccentric distance to a certain direction of the bone body, and the clamping part will be enlarged. 5 contact area.
[0039] The screw part 2 is a flat screw, and the plug hole 31 is an elongated hole or a circular hole matched with the flat screw; when the plug hole 31 adopts an oblong hole and a flat screw, ...
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Abstract
The invention discloses an occipital bone fixation assembly for occipital-cervical fusion, which comprises a screw part, a fixing plug and a tightening nut; a clamping part is arranged at the bottom of the screw part, and the clamping part is connected with the screw part, and the bone is punched at the thicker part of the occipital bone. hole, so that the clamping part passes through the bone hole and cooperates with the fixed plug and the tightening nut to make a fixed connection with the occipital bone; the fixed plug includes a plug hole, an upper disc cap and a lower plug tube; the upper disc cap and the lower plug tube are integrally formed, and the The centerlines of the upper disc cap and the lower plug tube are collinear, the plug hole runs through the upper disc cap and the lower plug tube, the lower plug tube is a hollow tube, which can be used for bone grafting, and the side wall of the tube is distributed with circular holes Facilitate the fusion of bone graft and occipital bone hole; because the bottom clamping part of the screw rod is in contact with the inner plate of the occipital bone, the lower surface of the tightening nut is in contact with the upper disc cap, and as the tightening nut is tightened, the lower surface of the upper disc cap is in contact with the occipital bone The outer plates are in contact with each other, and as a whole, the screw part is tightly fixed on the occipital bone to achieve the purpose of fixing. Since the connection method of this method is clamped and fixed up and down, the force volume of the fixed component and the occipital bone is larger.
Description
technical field [0001] The invention relates to the technical field of medical instruments, in particular to an occiput-cervical fusion occipital fixation assembly. Background technique [0002] In terms of occipital bone fixation in occipital-cervical fusion surgery, the existing fixation method adopts screw fixation. In terms of fixation stability, after fixation, it is often pulled out due to the influence of head and neck movement, and the fixation is prone to failure. [0003] After the screw is screwed into the bone tissue, it is mainly fixed by the cooperation between the screw thread and the bone body. The screw thread, screw height, screw-in depth and the degree of osteoporosis affect the effect of fixation. The defects of screw fixation are: the thread structure and the bone The body pullout volume contact surface is small; at the same time, due to the rigid contact, every micro-motion deformation will destroy the bone body, eventually leading to nail removal. Co...
Claims
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Application Information
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