Comparative Survival Analysis of Porous Tantalum and Porous Titanium Acetabular Components in Total Hip Arthroplasty
Background Porous tantalum acetabular components (PoTa) are well studied, but less is known about widely used porous titanium (PoTi) acetabular components. We performed a comparative survival analysis between PoTi and PoTa acetabular components. Methods Primary or revision THA performed using PoTi (n 2,976) or PoTa (n 184) acetabular components with minimum 2 year follow up (PoTi n 1,539; PoTa n 157) were analysed. Univariate and multivariate logistic regression were performed to test the effect of porous metal acetabular component type on revision surgery for aseptic cup loosening. Multivariate model was adjusted for acetabular defect severity according to the Paprosky Classification. Results Only PoTi components used in revision THA failed. Survival of the PoTi acetabular component was 98.6% when used in revision THA at mean 48.3 month follow up. After adjusting for severity of acetabular defect, there was no difference in survival between PoTi and PoTa acetabular components when used in primary or revision THA. Conclusions After adjusting for acetabular defect severity, both PoTa and PoTi acetabular components had excellent survival at mean 44.4 month (range 4.3 91.5 months) follow up when used in primary and revision THA.
Hip international the journal of clinical and experimental research on hip pathology and therapy