Interspinous stabilizer

Abstract

The invention relates to a universal stabilizer used between spinous processes, and belongs to the technical field of medical apparatus and instruments such as implants in the human body. The universal stabilizer is composed of an upper fixing plate, a lower fixing plate and an elastic structure. The upper fixing plate and the lower fixing plate are connected through the elastic structure, the middle of the upper fixing plate and the middle of the lower fixing plate are respectively provided with an opening, lock hooks are arranged at the bottoms of the openings, semicircular screw holes and vertical teeth are arranged on the two sides of the openings, and hollow hole structures are formed between the upper fixing plate and the elastic structure and between the lower fixing plate and the elastic structure. According to universal stabilizer used between the spinous processes, multiple mutually-perpendicular U-shaped deformation structures or springs are used for connection, and therefore elastic movements, such as forward bending, rear protraction, left bending, right bending and rotation in all directions on sagittal views, of operation segments are achieved. The universal stabilizer has the advantages that the structure is simple, stress is dispersed, implantation is convenient, fixation is firm and reliable, universal elastic movements can be achieved, and collision between materials and the spinous processes can be avoided, and the universal stabilizer solves the problems that according to various existing dynamic internal fixators used between spinous processes, the movements of the spines in all directions cannot be kept, the structure is complex, operation is difficult, and use is not durable.

Description

technical field [0001] The invention relates to a medical device built into a human body, in particular to an interspinous stabilizer used for dynamic fixation of cervical and lumbar vertebrae. Background technique [0002] At present, spinal fusion technology has achieved good results in the treatment of low back pain and cervical and lumbar instability, with a fusion rate of over 90%. However, studies have shown that its clinical efficacy has not reached the expected value; moreover, rigid internal fixation and spinal fusion may cause complications such as accelerated degeneration of adjacent segments, internal fixation failure, and postoperative pseudarthrosis formation. In view of this, dynamic fixation of the cervical and lumbar spine is becoming a popular technique for the treatment of degenerative cervical and lumbar diseases in recent years, including artificial total intervertebral disc replacement, artificial nucleus pulposus replacement, transpedicular dynamic ...

AI Technical Summary

Problems solved by technology

Other existing solutions for interspinous dynamic internal fixators are difficult to match with the uneven physiological activity patterns of the human spine. The height of the prosthesis and the spinous process is similar, so the supraspinous ligament needs to be sacrificed during the operation. Some prostheses collide with the spinous process and cause wear and tear, or some prostheses are easily loosened by long-term fixation with binding bands. It is difficult to ensure a low complication rate. good long-term effect

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