Effect of the preserving quadratus femoris on the bone mass of femoral calcar in atificial hip arthroplasty

Objective: To observe the effects of the preserving quadratus femoris on the bone mass of femoral calcar in atificial hip arthroplasty.Methods: Sixty femoral neck fracture patients treated with artificial hip arthroplasty were randomly divided into the observation group and control group(30 cases each group).The control group was treated with cutting off quadratus femoris,and the observation group was treated with preserving quadratus femoris.The operation time,blood loss and Harris hip score in two groups after 12 months of operation were observed.The bone mass of femoral calcar in two groups were investigated using craniocaudal oblique of 45-degree X-ray film after 3,6,12 and 24 months of operation.Results: The differences of the operation time,blood loss and Harris hip score after 12 months of operation between two groups were not statistically significant(P>0.05).The differences of the bone mass of the femoral calcar after 3,6 and 12 months of operation between two groups were not statistically significant(P>0.05),and the loss bone mass of femoral calcar after 24 months of operation in control group was higher than that in observation group(P<0.05).Conclusions: The preserving quadratus femoris in artificial hip arthroplasty may reduce the bone absorption of femoral calcar,and effectively decrease the osteolysis of femoral calcar.