The Dynamic Hip Screw and the Gamma nail made the patients to mobilize early and decreased the complications. We have treated 44 cases of the peritrochanteric fractures using Gamma nail(25 cases) and Dynamic Hip Screw (19 cases) between Aug. 1989 and Nov 1993, and compared the results of each group.

And obtained results were as follows

1. The traffic accident was constituted about one third proportion and unstable types of the peritrochanteric fractures were 25 cases among 44 cases(57%).

2. The Mean union time of the Gamma nail group was 10.4 weeks and the Dynamic Hip Screw group was about 13 weeks. There was statistically no significance in the mean union time between both groups.

3. There revealed significance(P<0.05) by statistical analysis in operation time, admission day, blood transfusion between both groups.

4. There revealed no signicance (p<0.05) by statistical analysis in degree of sliding of the lag screw and change of neck-shaft angle.

5. The complications in the Gamma nail group were varus in 3 cases and infection in 1 case, and in the Dynamic Hip Screw group there were varus in 3 cases, delayed union in 2 cases and refracture in 1 case.