The round cartilage ridge around the edge of the glenoid bone, known as the labrum, plays an important role in keeping your shoulder stable. It creates a bumper cushion that deepens the entire shoulder socket, thereby increasing the amount of energy required for the top of your upper arm bone to come out of the socket.
A tear or injury anywhere along the labrum can cause an unstable shoulder, and a shoulder joint that has dislocated multiple times is more likely to have extensive injury to the labrum. A labrum tear, also known as a SLAP lesion, can be diagnosed and treated with arthroscopy surgery.
Glenoid bone (shoulder socket) loss is a major risk factor for developing an unstable shoulder or a shoulder dislocation, and patients that have experienced any amount of glenoid bone loss may require a more advanced surgical procedure to correct an unstable shoulder.
Whether glenoid bone loss is the result of injury, gradual erosion, a developmental variation, or some combination of factors, maximizing the size of the glenoid bone through bone graft surgery is a vital component of the successful long-term treatment for unstable shoulders.