Long-term durability of alumina ceramic heads in THA

BMC Musculoskeletal Disorders

Research Article

Christian Merle¹  Marcus R. Streit¹  Moritz M. Innmann¹  Nicholas A. Beckmann¹  Tobias Gotterbarm¹  J. Philippe Kretzer¹  Thomas Bruckner² 

[1] Clinic for Orthopedics and Trauma Surgery, Center for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Schlierbacher Landstrasse 200A, 69118, Heidelberg, Germany;Institute of Medical Biometry and Informatics, University of Heidelberg, Im Neuenheimer Feld 305, 69120, Heidelberg, Germany;

关键词: Bearings;    Ceramic;    Polyethylene;    Hip Arthroplasty;    THA;    Hip Replacement;    THR;   

DOI  :  10.1186/s12891-015-0703-2

 received in 2014-12-12, accepted in 2015-09-02,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundThe optimal type of bearing for hip arthroplasty remains a matter of debate. Ceramic-on-polyethylene (CoP) bearings are frequently used in younger and more active patients to reduce wear and increase biocompatibility compared to Metal-on-Polyethylene (MoP) bearings. However, in comparison to metal heads, the fracture risk of ceramic heads is higher. In addition, ceramic head fractures pose a serious complication which often necessitates major revision surgery. To date, there are no long-term data (>20 years of follow-up) reporting fracture rates of the ceramic femoral heads in CoP bearings. The purpose of this research was to investigate long-term CoP fracture rate.MethodsWe evaluated the clinical and radiographic results of 348 cementless THAs treated with 2nd generation Biolox® Al2O3 Ceramic-on-Polyethylene (CoP) bearings consecutively implanted between January 1985 and December 1989. The mean age at implantation was 57 years. The patients were followed for a minimum of 20 years. At the final 111 had died, and 5 were lost to follow-up. The cumulative incidence of ceramic head fractures in the long-term was estimated using a competing risk analysis.ResultsThe cumulative incidence of ceramic head fracture after 22-years was estimated with a competing risk analysis at 0.29 % after 22-years (SE = 2.09 %; 95 % - CI: 0.03-1.5 %). The radiographic analysis revealed no impending failures at final follow-up.Discussion/ConclusionThe fracture rate of second-generation ceramic heads using a CoP articulation remains very low into the third decade after cementless THA.

【 授权许可】

CC BY   
© Beckmann et al. 2015