Austin Moore Hemiarthroplasty Visa Vis Bipolar Arthroplasty in the Management of Neck of Femur Fractures

Abstract

Background: Fracture neck of femur remains an unsolved fracture to orthopedic surgeons. Hemiarthroplasty with Austin Moore prosthesis in long term follow-up showed unsatisfactory results due to femoral stem loosening, acetabular erosions, intrusion of prosthesis into pelvis and difficulties to total hip conversion. These factors led to the development of bipolar prosthesis which may prevent the grinding of the metallic head over the bony acetabulam and degenerative changes. Materials and Methods: This is a descriptive study, case series of femoral neck fractures, 20 cases each (Total 40 cases) using Austin Moore and Bipolar prosthesis were done. The results were evaluated using Merele‘D’ Aubigne–Charnley hip score with regards to ability to walk, pain in hip and movement of hip. Results: In the prospectively studied cases, Austin- Moore hemiarthroplasty showed 77.78% of excellent result and 22.22% of good results, where as in Bipolar arthroplasty 87.5% showed excellent result and 12.5% showed good result. In the retrospectively studied cases, Austin- Moore hemiarthroplasty showed 72.73% good result and 27.27% poor results, where as in Bipolar arthroplasty 41.67% showed excellent results and 58.33% showed good results. Conclusion: Bipolar arthroplasty is a good operation for fracture neck of femur with satisfactory results in rural patients in long term follow up (follow-up to 5½ years). But in case of short term follow-up (followed up to 2 ½ years) both Austin-Moore arthroplasty Bipolar arthroplasty showed more or less similar end results.