To determine more useful method by comparing the functional recovery and postoperative complications according to operative methods in treatment of unstable trochanteric fracture of the femur with osteoporotic bone.

Of 45 cases with unstable femoral trochanteric fracture with osteoporosis who had been able to ambulate before injury, we compared postoperative functional recovery and complications between 25 cases treated by cemented bipolar hemiarthroplasty and 20 cases treated by dynamic compression hip screw.

Of 45 cases who had been treated by cemented bipolar hemiarthroplasty and dynamic compression hip screw, the functional results, according to the rating scale of Merle d Aubigne were rated as above good in 23 cases and 14 cases, respectively and postoperative mechanical complications were found in 2 cases and 7 cases, respectively. There was statistically significant difference(P<0.05).

Unstable trochanteric fracture of the femur with osteoporotic bone treated by cemented bipolar hemiarthroplasty showed good functional results and few mechanical complications for short term follow-up.