T Abe1, N Kaku2, T Tabata1, H Tagomori1, H Tsumura1. 1. Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan. 2. Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan. nobuhiro@oita-u.ac.jp.
Abstract
PURPOSE: The aim of this study was to evaluate clinical and radiographic findings of stage 3 or lower osteonecrosis of the femoral head (ONFH) with intact acetabular cartilage in patients treated with bipolar hemiarthroplasty (BHA). METHODS: A total of 79 hips that underwent BHA for ONFH were included in this study. The average observation period was 7.6 years. Clinical results were evaluated using the Harris hip score. We performed radiographic analysis to assess the migration of the outer cup, the permanent image around the outer cup, and loosening of the stem. RESULTS: The total Harris hip score improved from 50 points before surgery to 92 points at final follow-up, while pain improved from 14 points to 36 points. Flexion improved from 94° to 120° and abduction from 27° to 37°. One patient on dialysis showed progress in terms of inward migration, and revision surgery was performed on the patient 14 years after the original surgery. CONCLUSIONS: Midterm performance of BHA for stage 3 or lower ONFH at our hospital was good.
PURPOSE: The aim of this study was to evaluate clinical and radiographic findings of stage 3 or lower osteonecrosis of the femoral head (ONFH) with intact acetabular cartilage in patients treated with bipolar hemiarthroplasty (BHA). METHODS: A total of 79 hips that underwent BHA for ONFH were included in this study. The average observation period was 7.6 years. Clinical results were evaluated using the Harris hip score. We performed radiographic analysis to assess the migration of the outer cup, the permanent image around the outer cup, and loosening of the stem. RESULTS: The total Harris hip score improved from 50 points before surgery to 92 points at final follow-up, while pain improved from 14 points to 36 points. Flexion improved from 94° to 120° and abduction from 27° to 37°. One patient on dialysis showed progress in terms of inward migration, and revision surgery was performed on the patient 14 years after the original surgery. CONCLUSIONS: Midterm performance of BHA for stage 3 or lower ONFH at our hospital was good.
Entities:
Keywords:
Bipolar cups; Hemiarthroplasty; Osteonecrosis of femoral head; Stage 3
Authors: Michael A Mont; Thorsten M Seyler; Johannes F Plate; Ronald E Delanois; Javad Parvizi Journal: J Bone Joint Surg Am Date: 2006-11 Impact factor: 5.284
Authors: Vincent D Pellegrini; Bradley A Heiges; Brian Bixler; Erik B Lehman; Charles M Davis Journal: J Bone Joint Surg Am Date: 2006-08 Impact factor: 5.284