Universal stabilizer used between spinous processes

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 an interspinous universal stabilizer, which belongs to the technical field of human body implantation of medical equipment. Background technique [0002] At present, spinal fusion technology has achieved good results in the treatment of low back pain and lumbar instability, with a fusion rate of over 90%. However, studies have shown that its clinical efficacy has not reached the expected value; and rigid internal fixation and spinal fusion have the possibility of accelerating the degeneration of adjacent segments, failure of internal fixation, and postoperative pseudo-articular formation. In view of this, lumbar dynamic fixation is becoming a popular technique for the treatment of degenerative lumbar spine diseases in recent years. There are artificial total disc replacement, artificial nucleus replacement, transpedicular dynamic fixation, dynamic fixation between spinous processes, and small arthroplasty devices. Etc. 5 types. Am...

AI Technical Summary

Problems solved by technology

After the operation, the patient recovers quickly, the recurrence rate is low, the pain and other symptoms are significantly relieved, and the patients can get out of bed early and resume daily life. However, there are still many defects in the existing interspinous process dynamic internal fixator. Provide activities in a certain direction (for example, Coflex can only provide sagittal extension and flexion), some stresses are easy to concentrate in one place and cause the prosthesis to break, and some prostheses and spinous processes are similar in height, so the supraspinous ligament needs to be sacrificed during the operation , some prostheses collide with the spinous processes and cause wear and tear, some connections are complex (such as universal dynamic stabilizers between spinous plates), and some fixators are too bulky, resulting in large intraoperative trauma, large postoperative space occupation, and installation problems. Difficult (such as interspinous universal dynamic stabilizer), or some problems such as long-term fixation with straps and easy looseness, it is difficult to guarantee low complications and good long-term effects

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