1. A series of fifty-six patients with sixty-three dislocated hips treated by Colonna capsular arthroplasty are reviewed. The average follow-up is seventeen years.

2. The clinical results revealed excellent results in eight patients, good results in twenty-three patients, fair results in nineteen patients, and poor results in six patients.

3. The limitation of motion which occurred in many patients did not seen to affect the functional result except in patients with bilateral involvement.

4. Good results tended to occur in younger patients, in those who have had adequate preoperative traction, in patients with unilateral involvenient, and in those with no disease in other joints.

5. Poor results tended to occur in patients with bilateral involvement, in those in whom avascular necrosis developed, and in those who were operated on later in life.

6. The onset of degenerative changes in the hip associated with pain usually occurred in patients during the middle of the third decade following surgery.

7. The capsular arthroplasty can be a useful surgical operation if indications and technique are followed closely. One must realize the limitations and possible complications.

8. Centralization of the femoral head at the triradiate cartilage will facilitate subsequent reconstructive surgery.