An Alternative Solution to Achieve Primary Stability in Cementless Revision Hip Arthroplasty for Femur Ectasia

Abstract

Revision total hip arthroplasty is technically demanding, especially when treating a large defective femur. The aim of this study was to evaluate the clinical results of cementless total hip arthroplasty revision in patients with advanced femoral bony defects. Methods: By using the canaloplasty technique, which osteotomized the proximal femur to reduce the width of canal, 12 patients were enrolled and underwent revision operation. Patients were evaluated by radiographic examination and Harris hip score before and after the index procedures. Results: The average length of follow-up was 38.7 months. All the osteotomies united at a mean of 5.3 months. Structural allografts were used on six patients to augment the thinned cortices. A total of 11 femoral components (91%) achieved and maintained stability at the last follow-up. One patient was complicated with early stem subsidence and another with deep infection. Both patients were treated successfully without late sequelae. The mean Harris hip score improved from 37.2 to 75.0 after the operation (p < 0.05). Conclusion: The canaloplasty technique could be an alternative solution to help revision surgery in some younger patients with advanced femoral defects.

Keywords

• canaloplasty
• cementless
• femur osteotomy
• onlay structural allograft
• revision hip arthroplasty