Most people don’t think about dislocations, thinking that they are just like in the movies, so they can just “click” and break it back. In fact, every time the shoulder joint is dislocated, the joint is injured, causing further tearing of the glenoid labrum ligament or rotator cuff tendon, loosening of the joint capsule, wear and tear of the articular cartilage, and even bone destruction and fracture, resulting in early onset of osteoarthritis of the shoulder joint. Patients with recurrent shoulder dislocations are unable to engage in heavy physical labor and most sports, which can be said to have a very significant impact on the patient. Attention should be paid after joint dislocation is reset Young people are prone to habitual dislocations, and studies have shown that the younger you are when the initial dislocation occurs, the more likely it is to recur. For example, after an anterior shoulder dislocation occurring at <20 years of age, the likelihood of another dislocation is as high as 90%, and their risk of re-dislocation is 12.7 times higher than in patients >20 years of age! Therefore, it can be said that once a dislocation of the shoulder joint occurs in young athletic people, if it is not treated in time, the chances of it becoming a habitual dislocation are very high! Therefore, the initial dislocation of the shoulder joint should be taken seriously enough, and further treatment is still needed after the reset. The main measures include: taking a film after the reset to exclude fracture, rotator cuff injury and other complications; wearing a shoulder and elbow belt for 3-4 weeks for suspension protection; strengthening the stability and shoulder mobility with functional exercises of the relevant muscle groups to avoid stiffness, etc. In elderly patients, if the shoulder joint is still painful after resetting and the shoulder is weak to lift, it is likely to be a rotator cuff tear, which needs to be confirmed by MRI. These patients often need to undergo minimally invasive rotator cuff repair surgery to recover. Why does the shoulder joint become habitually dislocated? The shoulder joint has a “large head with a small glenoid and a shallow base”, which allows the humeral head to move widely, but also makes it susceptible to dislocation. Due to the lack of bony accommodation of the humeral head by the scapular glenoid, its stability can only be achieved by the “softness” of the muscles, glenoid lip and ligaments. First of all, the four muscles of the rotator cuff hold the humeral head in three directions: from the front, top and back, and their combined force forms the net force of the humeral joint, which is stable as long as it falls within the range of the scapular glenoid. In addition, a glenoid lip is attached around the scapular glenoid and connected to the joint capsule ligament, forming a bowl-shaped glenoid fossa with a hard center and soft surroundings. Under normal circumstances, the joint capsule is closed and a small amount of joint fluid is bonded inside, generating a negative pressure that sucks in the humeral head, the so-called glenohumeral suction cup mechanism, which is actually the same as the water plugs that pass through the toilet. When the shoulder joint is dislocated for the first time, violence often leads to tearing of the glenoid labrum and rotator cuff (tearing of the glenoid labrum is also called Bankart injury), or even tearing off a piece of the bony scapular glenoid, forming a bony Bankart injury. The torn glenoid labrum capsule complex is often difficult to heal because of contracture, forming a permanent fissure in the front, or a deformed healing in the front and bottom of the scapular glenoid, and the suction cup mechanism is cracked. When the shoulder joint is again abducted and rotated, the “net glenohumeral joint force” can easily break through the anterior and inferior weakness of the scapular glenoid, resulting in recurrent dislocation. In addition, after dislocation, the humeral head is often stuck in the anterior inferior part of the scapular glenoid, and the posterior upper part of the humeral head and the anterior inferior part of the scapular glenoid squeeze each other, forming a “kissing injury”, which, even after resetting, still leaves a “kissing scar” of missing bone, which can be loved to the bone; In patients with repeated dislocation, the hickey will become deeper and deeper, which is called “bipolar bone defect”. “) and dislocate again. Habitual dislocations need to be treated early. Patients with recurrent shoulder dislocations, especially young people, athletes, older adults with combined rotator cuff injuries, or military or police officers with special occupations, are often recommended to undergo surgery as soon as possible, the earlier the treatment, the simpler the surgery and the better the results. With surgical treatment and regular post-operative rehabilitation, most patients can regain a stable shoulder joint and eventually return to sports or work.