4SikorskiJM,BarringtonR.Internal fixation versus hemlarthroplasty for the displaced subcapital fracture of the femur:A prospective randomised study[J].J BoneJoint Surg(Br),1981,63:357-361.
5Whittaker RP,Abeshaus MM,Scholl HW,et al.Fifteen years experience with metallic endoprosthetic replacement of the femoral head for femoral neck fractures[J].Trauma,1972,12:799-806.