Total Hip Arthroplasty with a Cementless Acetabular Component and a Cemented Femoral Component in the Treatment of Chinese Patients with Femoral Head Necrosis

• Published in: The Journal of arthroplasty 2008-10, Vol.23 (7), p.1022-1030
• Main Authors: Hui, Zhang, MD, Pei, Fu-xing, MD, Shen, Bin, MD, Yang, Jing, MD, Chen, Zhi-yu, MD, Huang, Qiang, MD
• Format: Article
• Language: English
• Subjects: Acetabulum - surgery; Adult; Aged; Aged, 80 and over; Arthroplasty, Replacement, Hip; Bone Cements; Cementation; cemented component; cementless component; Female; Femur - surgery; Femur Head Necrosis - surgery; Hip Prosthesis; Humans; loosening; Male; Middle Aged; Orthopedics; osteolysis; osteonecrosis; Prosthesis Failure
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1016/j.arth.2007.09.012

Abstract The purpose of this study was to evaluate midterm clinical and radiographic outcomes associated with hybrid total hip arthroplasty in a consecutive series of 86 Chinese patients (93 hips) with osteonecrosis of the femoral head, which revealed that the mean Harris hip score increased from 39 ± 6.0 points before operation to 90.4 ± 4.6 points at the latest follow-up. There was pelvic osteolysis in one hip (1%), which required revision, and some small focal areas of femoral osteolysis in 12 hips (13%) were observed. The mean linear wear rate was 0.143 ± 0.05 mm/y (0.02-0.45 mm/y). No loosening of the components was observed radiographically. The survival rate of the acetabular and femoral components for revision was 98% (95% confidence interval, 0.96-1.0) and 100% (95% confidence interval, 0.95-1.0). Hybrid total hip arthroplasty in patients with osteonecrosis of the femoral head had a satisfactory clinical and radiographic outcome at a minimum 5 years of follow-up. Because polyethylene wear and osteolysis cannot be avoided, the long-term effect should be further studied.