Abstract
1. One hundred and seventy-three hips in 138 patients have been examined and studied in reference to the type of treatment received.
2. Shepherd's method of assessing the results of arthroplasty operations has been adapted to this series.
3. Satisfactory results were found in 77·9 per cent of all patients.
4. The value of straight longitudinal traction is questioned. Medial rotation appears to be an essential step in the reduction of the deformity.
5. Manipulation was found to be a relatively safe and effective method of reducing the deformity in patients seen soon after an acute episode, and should be reserved for them.
6. Complications were common after nailing operations, and included subtrochanteric fracture in three cases.
7. Avascular necrosis was the commonest cause of a poor result. The two types of avascular necrosis are discussed.
8. Avascular necrosis was found in 37 per cent of cases in which a manipulation was followed by a nailing operation.
9. Avascular necrosis was not found in any case in which a manipulation was combined with the use of Moore's pins, but such cases were kept under observation for a shorter time.
10. Avascular necrosis was found in 38·1 per cent of cases of cervical osteotomy.
