The primary goal in the treatment of the trochanteric fracture in the elderly with osteoporosis and poor general condition is to do early ambulation by rigid fixation of fracture and to decrease threatened postoperative complication. But these fractures have thirty-nine always represented a particularly difficult problem of treatment for orthopaedic surgeon. The 39 cases of intertrochanteric fracture of the femur in the elderly over 70 year in the age had operative procedures at the Department of Orthopaedic Surgery of Pusan National University Hospital and all cases were divided into compression hip screw fixation group, Jewett nail fixation group and Ender nailing group and were followed from 1 year to 3 year 8 months.

The results were as follows;

1. By the Tronzo classifiaction, ihe most common type was type III (74.3%), type II(66.7%) by Boyd-Griffin classification, and unstable fracture(76.9%) by Evans classification.

2. The average bone union was about 14 weeks in compression hip screw fxation group, 15 weeks in Jewett nail fixation group 13 weeks in Ender nailing group.

3. For all patients, radiographic measurement for osteoporosis using the singh index were preformed ; 35 cases(89.7%) of these patients had poor bone quality below grade III, and the rate of loss of reduction was no statistical difference in the each group(p>0.05).

4. Ender nailing allows immediate mobilization without restriction of weight bearing after operation.

5. The modified technique to have the distal end of nails within the medullary cavity gave satisfactory result to prevent the distal migration of nails.