Results of cemented metal-backed acetabular components: a 10-year-average follow-up study.

Autor: Chen FS; Department of Orthopaedic Surgery, Musculoskeletal Research Center, Hospital for Joint Diseases Orthopaedic Institute, New York, New York 10003, USA., Di Cesare PE, Kale AA, Lee JF, Frankel VH, Stuchin SA, Zuckerman JD
Jazyk: angličtina
Zdroj: The Journal of arthroplasty [J Arthroplasty] 1998 Dec; Vol. 13 (8), pp. 867-73.
DOI: 10.1016/s0883-5403(98)90191-7
Abstrakt: The clinical and radiographic results of 86 primary total hip arthroplasties performed in 74 patients from 1983 to 1987 with a cemented metal-backed acetabular component and a cemented collared straight femoral stem with a 32-mm head were reviewed at a mean follow-up of 10.1 years. Seven patients (9.2%) underwent acetabular component revision at a mean of 9.0 years after implantation; an additional 24 components (31.6%) demonstrated evidence of radiographic loosening, resulting in a total failure rate of 40.8%. Periacetabular radiolucencies were noted in Charnley zones at the following rates: 34.2% in zone I, 18.4% in zone II, and 27.6% in zone III. In addition, 18.4% and 38.2% of implants demonstrated evidence of migration and excessive polyethylene wear. Excessively vertical cup placement (>49 degrees inclination) at the time of initial arthroplasty was statistically correlated with polyethylene wear, implant migration, and fixation failure. A trend of increasing implant failure was also noted with decreasing polyethylene liner thickness. Periacetabular cement mantle thickness was not statistically correlated with subsequent component loosening or failure. Results of Kaplan-Meier survivorship analysis using revision as an endpoint showed 93.6% survivorship at 10 years and 88.4% at 12 years. The mean modified Harris hip scores were 46.9 preoperatively and 81.8 at final follow-up. The significant overall rates of radiographic loosening, migration, polyethylene wear, and implant revision confirm the suspected trend of increasing failure rates of cemented metal-backed acetabular components over time.
Databáze: MEDLINE
Externí odkaz: