Micromovement fixing plate for dislocation of acromioclavicular joint

Abstract

The invention discloses a micromovement fixing plate for the dislocation of an acromioclavicular joint, and belongs to the technical field of osteopathic medical apparatus. The micromovement fixing plate is used for restoration and fixation operation for the dislocation of the acromioclavicular joint and comprises a collarbone positioning plate and an acromion plate, wherein 1 to 3 positioning sleeves are fixed on the front part of the collarbone positioning plate; screw threads are formed in the positioning sleeves; an acromion sleeve is arranged on the rear part of the acromion plate; the acromion sleeve is a through hole and corresponds to the positioning sleeves; a connecting rod is arranged in the acromion sleeve; screw threads matched with the internal screw threads of the positioning sleeves are formed at one end of the connecting rod; and a cylindrical rod cap is arranged at the other end of the connecting rod. In the micromovement fixing plate for the dislocation of the acromioclavicular joint, the collarbone positioning plate and the acromion plate are in sleeve connection. A side shift of the collarbone positioning plate has a micromovement of 5 to 10 degrees with an acromion, so the micromovement fixing plate better accords with physical activity characteristics of the acromioclavicular joint and has the advantages of high fixation strength, contribution to the implementation of a ligament repair operation and low damage to the capsula articularis and surrounding ligaments.

Description

technical field [0001] The invention relates to a fixation device for treating acromioclavicular joint dislocation, belonging to the technical field of orthopedic medical devices. Background technique [0002] In orthopedic medical surgery, the reduction and fixation of acromioclavicular joint dislocation is an operation that needs to be mastered. The dislocation of the acromioclavicular joint is mostly a direct violent injury, such as a direct impact on the shoulder in a traffic accident. When this part is fractured or dislocated, it can cause varying degrees of damage to the nearby ligaments, resulting in dysfunction of the shoulder joint. There are many surgical methods for the treatment of acromioclavicular joint dislocation. The traditional ones include Kirschner wire tension band fixation, hook plate fixation, and wire fixation. Among these methods, the disadvantage of the Kirschner wire tension band fixation method is that the Kirschner wire is easy to come out, and...

AI Technical Summary

Problems solved by technology

Among these methods, the disadvantage of the Kirschner wire tension band fixation method is that the Kirschner wire is easy to come out, and the fixation is not firm, resulting in anteroposterior instability; and when the hook plate is used to treat acromioclavicular joint dislocation, the distal hook of the hook plate is inserted in the shoulder. The lower part of the acromioclavicular joint ligament is prone to subacromial impingement when the upper limb is abducted, and because of its larger profile, it is not conducive to the repair of the acromioclavicular joint ligament, and the acromioclavicular joint ligament is often damaged when it is taken out.

The distal end of the hook plate is inserted under the acromion without additional fixation, so it will move back and forth and up and down, and some patients even have obvious dislocation of the hook plate and lose the fixation effect; fixing the distal clavicle and acromion at the same time can increase its fixation firmness, but does not conform to the physiological activity characteristics of micro-movement at the acromion and distal clavicle, it is best to have micro-motion function on the basis of firm connection

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