Arthroscopic stabilization in posterior or multidirectional instability of the shoulder

The diagnosis and treatment of posterior or multidirectional instability of the shoulder can be difficult. Normal laxity must be differentiated from pathologic instability. Once clinically diagnosed, there are several likely factors that contribute to pathologic instability. Although many patients with posterior or multidirectional instability of the shoulder respond well to nonsurgical treatment, when surgical intervention is required, the success rate has not been as favourable as that for repairing isolated anterior instability of the shoulder.