The shoulder joint is a ball and socket joint. The round top of your arm bone (the ‘ball’) fits into the groove of your shoulder blade (the ‘socket’). It is dependent on muscles, the joint capsule and a rim of cartilage (called the labrum) to stabilize it during movement. A dislocated shoulder is when the entire ball is out of the socket
The unstable shoulder joint can be repaired using arthroscopic surgery. The purpose of the surgery is to repair torn/stretched capsule and the labrum so that they are better able to hold the shoulder joint in place.
The success rate of this surgery is very high. The vast majority of patients are able to return to work and sport without further dislocations.