Is there a significant difference in surgery and outcomes between unipolar and bipolar hip hemiarthroplasty? - A Prospective Study

Abstract

Fracture neck of femur remains an unsolved problem till today and is a common orthopaedic problem in old age. Various methods of treatment have been employ but without a universally accepted procedure. In our study the outcomes of cemented Bipolar Hemi Arthroplasty (BHA) over the Austin Moors Prosthesis Arthroplasty (AMP) were compared. Our study was conducted from May 2014 to April 2016 at a tertiary care centre. 30 patients with intra capsular fracture neck of the femur were treated with AMP and 30 patients were treated with BHA. Clinical and radiological follow up was done.In results the mean follow up was two years (range six months - two and half years). At latest follow up, the Harris Hip Score in AMP group was 76.4 (range 74 - 86) and in BHA it was 92 (range 80 - 96). Hip and groin pain was reported in 2 patients in uncemented BHA and 6 patients in AMP but did not limit activity in both the groups. Subsidence of the prosthesis less then 5mm was seen in 8 cases in AMP and none in BHA. Two cases of protrusio acetabuli were reported in AMP group. In conclusion, the patients with fracture intracapsular neck of the femur treated by cemented BHA have better outcomes as compared to patients treated with AMP.