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INTRODUCTION: Management of displaced fracture neck femur in the elderly population is frequently done by Hemiarthroplasty or Total Hip Replacement (THR). It avoids high rates of nonunion and avascular necrosis which usually occur after internal fixation of neck femur fractures in this age group. AIM: The present study aimed to evaluate patient function and complications following hemiarthroplasty and total hip replacement in elderly population with displaced femoral neck fractures. MATERIALS AND METHODS: Patients above 60 years of age with displaced fracture neck femur were studied over the period of four years. All the clinical parameters and co-morbid conditions were noted at the time of presentation. The patients associated with co-morbid conditions and underlying pathology were excluded from study. Garden’s classification was used for classification of neck femur fractures. After due informed consent patients of displaced fracture neck femur were randomized by simple randomization and allocated for hemiarthroplasty or THR. Antibiotics were given preoperatively at the time of induction and postoperatively for 5-7 days. Surgery was carried out by Modified Gibson approach. Any complications during pre and postoperative period were noted. Follow-up of patients was done 1 month, 3 months, 6 months and 1 year interval with the help of Harris hip score. RESULTS: Total 80 patients were enrolled in the study group, with 40 patients in each group. The mean age of patients was 73 years in hemiarthroplasty group and 78 years in THR group. Female to male ratio was 55:45. Mean operative time was 35 minutes in hemiarthroplasty group and 45 minutes in THR. Average intraoperative blood loss was 200cc and 300cc in hemiarthroplasty and THR respectively. The mean hospital stay was 14 days in both the groups. Superficial wound infection was noted in hemiarthroplasty group while in THR group deep wound infection (n=1) and prolonged ICU stay (n=1) were noted. The mean Harris hip score was better in THR group as compared to Hemiarthroplasty group at one year follow-up. CONCLUSION: In elderly patients with fracture neck femur hemiarthroplasty takes less operative time, less blood loss per operatively and few complications postoperatively as compared to THR. The functional outcome at one year is better with THR as compared to hemiarthroplasty.