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.
Geisel School of Medicine at Dartmouth, Hanover, New Hampshire - USA.
Emil S
ES
Vutescu
David Geffen School of Medicine at UCLA, Los Angeles, California - USA.
Peter
P
Hsiue
Rush University Medical Center, Chicago, Illinois - USA.
Wayne
W
Paprosky
University of Toledo College of Medicine and Life Sciences, Toledo, Ohio - USA.
Sumon
S
Nandi
D000077:Acetabulum / Q000601:surgery*; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D016062:Porosity; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D016019:Survival Analysis; D013635:Tantalum; D013997:Time Factors; D014025:Titanium
D013635:Tantalum; D014025:Titanium