Rotation and anti-regression anterior cervical internal fixation device

Abstract

The invention discloses an anterior cervical internal fixation device of rotation and non-regression type, which comprises an anterior fixation plate and several bone screws connecting the anterior fixation plate and a human body cone, and corresponding bone screws are set on the anterior fixation plate number of bone screw mounting holes, the bone screw mounting holes are of hemispherical structure, the head of the corresponding bone screw is of hemispherical structure, and the anterior fixation plate is equipped with a detachable The anti-regression cover plate is closely attached to the head of the bone screw. The above-mentioned rotary anti-regression type cervical vertebra anterior internal fixation device is simple in structure, easy to operate, and has a certain rigidity and flexibility; it is convenient for operation The middle bone screw is screwed in, and the direction of the bone screw screw is adjusted at the same time; the bone screw is locked after surgery, it is not easy to retreat, and it is closer to the characteristics of the cervical curvature of the Chinese race.

Description

technical field [0001] The invention relates to a medical device, in particular to a rotation and regression-type anterior cervical internal fixation device. Background technique [0002] Anterior cervical fixation plate (ACP) internal fixation is a better method for stabilizing the cervical spine in anterior cervical surgery. The front edge of the vertebral body is internally fixed with a fixed plate and screws to stabilize the cervical spine, fix the bone graft block, promote the fusion of the bone graft area, and restore the normal intervertebral height, physiological curvature and spinal canal capacity. The anterior approach of the cervical spine The highest level of fixed plate fixation is C2, and the lowest is T2. Patients using the ACP system generally have improved fusion rates when performing single-layer fusions, reduced graft dislodgement accidents, early patient mobility, reduced need for external cervical collars, and improved ability to correct and prevent cer...

AI Technical Summary

Problems solved by technology

The main disadvantages of such systems are: the plate is too rigid, absorbs too much structural stress, inhibits the fusion of bone grafts and even causes structural failure

[0017] 1. The screw-in angle of the bone screw is not easy to adjust

[0018] 2. The effect of the locking mechanism is not good, and the bone screw is easy to retreat and fall off after operation

[0019] 3. The rigidity is high, and after implanting in the human body, the movement of the patient's cervical spine is restricted

[0020] 4. The screw-in angle of the bone screw cannot be adjusted

[0021] 5. The size series of foreign products are slightly different from those of Chinese cervical vertebrae, which makes it difficult to choose clinically

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