Abstract: Objective:To investigate the efficacy of antiosteoporosis treatment on elderly patients with intertrochanteric fractureMethods:Elderly patients with intertrochanteric fracture treated with PFNA were randomly divided into antiosteoporosis treatment group（group A）and nonantiosteoporosis treatment group（group B）.The patient's general information was recorded.Patients in group A were given antiosteoporosis treatment after the operation.Patients in group B receive no antiosteoporosis drugs.One year followup was carried out and several indicators were recorded，such as the fracture healing time，the occurrence of fractures in other parts of the body，the complications of deep infection，hip varus，internal fixation incision，internal fixation fracture and internal fixation failure.The hip function was evaluated by the Harris score system at 6 months and 1 year after surgery，while the bone density was tested by the United States Lunar DPXNP dualenergy xray absorptiometry.Results:All cases were followed up.The fracture healing time in group A was（12.1±2.9）weeks and in group B was（12.8±3.3）weeks.There was no significant difference between the two groups（P>0.05）.Neither deep infection nor hip varus，incision of internal fixation，fracture around internal fixation，internal fixation failure or other complications occurred in both groups.During the followup period，there was none refracture of limbs and other parts in group A，2 distal fractures of radius and 1 thoracolumbar fracture happened in group B（P>0.05）.The Harris score of hip joint in group A[87.3±14.6，95.8±15.4] at 6 months and 1 year after operation were significantly higher than in group B[78.6±15.9，86.1±16.8]（P<0.05）.Compared with the control group，the bone mineral density in group B[0.66±0.08，0.71±0.10] was significantly increased than group A[0.74±0.05，0.81±0.09]at 6 months and one year after surgery，the difference was statistically significant（P<0.05）.Conclusion:In elderly patients with intertrochantericfracture，the postoperative  antiosteoporosis treatment didn’t promote the fracture healing significantly，but it made good sense in increasing bone mineral density and improving hip joint function.

Key words: osteoporosis, intertrochanteric fractures, proximal femoral nail antirotation