The acromioclavicular joint is composed of the acromion and the medial aspect of the acromion, and is lined with a fibrocartilage disc. Causes: When the affected shoulder is landed, the upper arm is inwardly retracted and violence acts downward on the acromioclavicular joint, the acromioclavicular end of the clavicle reaches downward to the first rib to form a lever, which first injures the acromioclavicular ligament. Performance: local pain and limitation of joint movement. In sitting or standing position, the shoulder on the affected side is swollen and obviously deformed when compared with the two sides. Local pressure pain and a floating sensation at the end of the acromion of the clavicle. Examination: X-rays show different degrees of displacement of the acromion and widening of the rostral lock gap. Treatment:
1. non-surgical treatment: for type I (cervical wrist band or tricot immobilization for 2 weeks) and type II (elastic band or tape band to compress the external end of the clavicle downwards) injuries. remove the immobilization band after 4 weeks and start gradual activities.
2. Surgical treatment: For type III injuries, surgical treatment is generally recommended. Conventional use of tension band or with hook plate fixation, postoperative protection with triangular towel or neck and wrist band, 2 only to 4 weeks after gradual practice activities.