Background: In elderly patients diagnosed with displaced femoral neck fractures Hemireplacement arthroplasty (HRA) of the hip is considered to be the treatment of choice. Although still controversy exist whether using bipolar prosthesis has any added functional advantage over unipolar prosthesis. Several research papers have been published over the past few decades, with few articles stating no added advantage with bipolar prosthesis and few stating Bipolar prosthesis has good functional outcomes. The primary aim of this study was to analyze if there is any functional benefit using bipolar prosthesis, functional assessment was done using Harris Hip Score (HHS).

Methods: a prospective comparative study was conducted from Jan 2022-2023 in HIMS Hassan, elderly patients diagnosed with displaced femoral neck fractures in outpatient and casualty, Department of Orthopedics. 60 such patients were selected as per inclusion and exclusion criteria. Consent was taken and patients were assessed for functional outcomes in post operative follow-ups 3 months and 1 year using HHS (Harris Hip Score). Post operative standard rehabilitation and mobilization protocols were followed.

Results: the average HHS were similar in unipolar and bipolar prosthesis in both the follow ups and hence no significant statistical difference between both the groups. 10% of unipolar patients showed radiological features of acetabular erosion at 12 month follow up. Although unipolar candidates had 71.4 and bipolar candidates had 78.3 HHS scores at 12 months, no significant statistical difference (p=0.09) was observed between the two groups.