What is shoulder instability?
Shoulder instability is the condition in which the soft-tissue restraints of the shoulder (tendons, ligaments, and labrum) can no longer provide stability to the shoulder joint. Of the four joints within the shoulder complex, the glenohumeral joint, formed by the articulation of the humeral head (upper arm bone) into the glenoid socket of the scapula (shoulder blade), is affected by shoulder instability. This condition is often the result of a blunt force trauma to the shoulder that causes the humeral head to separate from the glenoid socket. In the event of joint separation, the ligaments and tendons are stretched or torn, either partially or completely, away from their attachment site. Individuals that participate in sports-related activities involving repetitive overhead motions, commonly seen in swimming, volleyball, or baseball, are most at risk of developing shoulder instability. Dr. Matthew T. Provencher, orthopedic shoulder doctor, treats patients in Vail, Aspen, Colorado Springs, and the Denver, Colorado area who have experienced shoulder instability and are in need of surgical repair.