Does Osteoporosis Increase Early Subsidence of Cementless Double-Tapered Femoral Stem in Hip Arthroplasty?

• Published in: The Journal of arthroplasty 2012-08, Vol.27 (7), p.1305-1309
• Main Authors: Rhyu, Kee Hyung, MD, Lee, Se Min, MD, Chun, Young Soo, MD, Kim, Kang Il, MD, Cho, Yoon Je, MD, Yoo, Myung Chul, MD
• Format: Article
• Language: English
• Subjects: Adult; Aged; Aged, 80 and over; Arthroplasty, Replacement, Hip - instrumentation; Case-Control Studies; Equipment Failure - statistics & numerical data; Female; Femoral Neck Fractures - surgery; Femur - surgery; Femur Head Necrosis - surgery; Hip Joint - diagnostic imaging; Hip Joint - surgery; Hip Prosthesis; Humans; Male; Middle Aged; Observer Variation; Orthopedics; Osteoarthritis, Hip - surgery; osteoporosis; Osteoporosis - complications; Prosthesis Design; Radiography; subsidence; tapered stem; total hip arthroplasty; Weight-Bearing
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1016/j.arth.2011.10.026

Abstract Among 320 hip arthroplasties performed between January 2007 and March 2008, patients younger than 50 years old and patients older than 70 with a T-score at the proximal femur less than −2.5 made up the control and study group, respectively. There were 40 patients in each group. We measured stem subsidence, both digital and manual methods. Measurements were made from radiographs taken serially from 2 weeks to 1 year after surgery. The amount of mean subsidence for each group was not different, and all stems showed stable fixation in the final radiographs. Our study suggests that even in osteoporotic proximal femurs, press-fit fixation of double-tapered stems for hip arthroplasty can be safe and effective without excessive early subsidence.