The Gamma nail combining the advantages of a sliding lag screw and the intramedullary femoral fixation is a advance in the treatment of trochanteric fractures. The Gamma nail is a new intramedullary device which has been applied in treatment of the trochanteric fractures with the benefits of closed technique such as low blood loss, low risk of infection, short operative time, short bone union period and early weight bearing and with the biomechanical advantages such as short lever arm and decreased bending moment. The implant can be used by the method of static or dynamic.

Intraoperative compression of the fracture segments can be achieved by acting on the sliding lag screw and further compression is given by weight bearing.

We studied 31 cases of patients who had the trochanteric fractures and treated opratively with Camma nail. The intertrochanteric fracture was 25 cases and subtrochanteric fracture was 6 cases.

Intraoperative complication was encountered failure of distal locking in 1 case. Postoperative complications were encounted superior cutting-out in 3 cases. As results of postoperative ambulation, 4 cases were death, 4 cases were bedridden state, 4 cases were ambulation state within house, 19 cases were social activity respectively.