The frequency of deterioration toward Recurrent dislocation of the shoulder is approximately 20%. Recurrent dislocation is likely to occur in the patients with joint laxity and especially in youth who had unproperly short length of immobilization, however, as for the aged, recurrent dislocation is rarely seen.
The research is performed this time on the cases of over 50-year-old to find the relationships between traumatic dislocation and recurrent dislocation of the shoulder. The items of research are as follows; condition of injury, length of immobilization, the number of times of dislocation, joint laxity, Hill-Sacks lesion, and Bankart lesion. As the results, the cause of recurrence in our five cases seems to be by Hill-Sachs lesion rather than joint laxity.
