Shoulder Dislocation Shoulder instability can be a common problem after a shoulder dislocation. If the shoulder slips completely out of the socket, it has become dislocated . Repeated dislocations are not only a nuissance, but can cause further injury to the shoulder and can lead to arthritis of the shoulder if not treated. The tendons of four muscles form the rotator cuff. The muscles are called the supraspinatus, infraspinatus, teres minor, and subscapularis.
Tendons attach muscles to bones.
Muscles are able to move bones by pulling on these tendons. Good strong rotator cuff muscles can help stabilize the shoulder. The shoulder joint capsule is a bag of tissue that completely surrounds the shoulder joint. The joint capsule is made up of ligaments that joint tgether to form this water tight bag. A ligament is a soft tissue structure made up of connective tissue.