Cervical anterior fixation system and manufacturing method thereof

Abstract

An internal fixation system for the anterior cervical vertebrae and a preparation method therefor. The system comprises a pair of fixing legs (1) arranged oppositely; the ends of the pair of fixing legs (1) are connected by a legs connection rod (2); the other ends of the fixing legs (1) are conical; saw-tooth barbs (5) are arranged on the inside surface of each fixing foot (1); saw-tooth ridges (6) are arranged on two sides of each saw-tooth barb; the middle of the legs connection rod (2) is pierced to form an observation window (3). While the system exerts a distraction force to the two sides of the middle of the observation window (3) of the legs connection rod (2), the two fixing legs (1) continuously press inwards, thus achieving the effect of pressing and fixing a single segment of cervical spine; the system accords with the physiological structural features of the cervical spine, has good conformability, fastens effectively, is simple in structure and easy to put in place and adjust. The preparation method uses single-piece shaping and a degradable magnesium and magnesium alloy matched bioactivity coating, so that the degrading speed of the magnesium and magnesium alloy can be effectively controlled, and injury caused by separation of a screw from a steel plate or removal in a second operation is fully avoided.

Description

technical field [0001] The invention relates to a medical fixation system and a preparation method thereof, in particular to an anterior cervical internal fixation system and a preparation method thereof. Background technique [0002] Since Robinson in 1955 and Cloward et al. first introduced the anterior cervical fusion surgery in 1961, the surgical method of anterior cervical plate and screw internal fixation has been widely accepted, especially in the clinical treatment of traumatic fractures, dislocations and degenerative cervical vertebral fractures. Cervical diseases and other aspects have been widely used. Anterior plate and screw internal fixation after discectomy and bone graft can significantly enhance the stability of the cervical spine and bone graft, reduce pathological activities that can lead to the formation of pseudarthrosis, prevent the loss of intervertebral height and promote bone graft fusion, and patients can recover early Get out of bed to reduce post...

AI Technical Summary

Problems solved by technology

This invention has the following problems: single structure design, nail foot structure, non-degradable titanium alloy material, strong foreign body feeling

The disadvantages of this type of bone plate are: firstly, when there are many bone fragments or fracture lines at the fracture site, the amount of bone plate or bone screw used will be greatly increased; secondly, the magnesium alloy has low strength and cannot be directly fixed. When screwing into the bone, it is necessary to use hard bone nails such as stainless steel to tap the hole first, which increases the difficulty and time of the operation for the doctor; finally, screwing in the bone screw is another damage to the bone, which increases the original trauma area and prolongs the operation time. Increased recovery cycle and increased patient suffering

[0007] The above patents involving magnesium alloys mainly involve raw materials, surface treatment, and some cages, screws, etc., and none of them are specifically aimed at the anterior cervical fixation system, especially the technical points such as the integrated pressurized structure.

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