• Arch Orthop Trauma Surg · Dec 2013

    Comparative Study

    Early loosening of a press-fit cup with ceramic-on-ceramic articulation: our early results.

    • Daniël Haverkamp, Stijn Westerbos, Martin M Campo, Ritsert H Boonstra, G H Rob Albers, and Harm M van der Vis.
    • Department of Orthopedic Surgery, Slotervaart Hospital, Amsterdam, The Netherlands, D.Haverkamp@osteotomie.nl.
    • Arch Orthop Trauma Surg. 2013 Dec 1;133(12):1757-62.

    IntroductionIn this study, we present the short-term results of the Selexys TH+ cup with the Ceramys inlay which is a press-fit cup with a ceramic-on-ceramic articulation. (Mathys, Bettlach, Switzerland). We compared the results with a retrospective-matched control group with a Delta PF cup (Lima, Udine, Italy), which is also a press-fit cup with a ceramic-on-ceramic articulation.Materials And Methods257 elective hip arthroplasties with the Selexys TH+ cup in 250 patients placed in 2009 and 2010 were analyzed and compared with a control group retrospective analysis of the uncemented Delta PF cup (Lima, Udine, Italy) placed in 2007 and 2008 in 208 patients (222 hips). Surgical technique and surgeons were identical in both groups.ResultsDuring a follow-up period of 3-21 months, 19 aseptic loosenings (7.4 %) were found for the Selexys TH+ cup. The survival plotted by a Kaplan-Meier curve shows a 1-year survival of 87.4 %. The Lima Delta PF cup showed a 1-year survival of 99.5 %. Failure analysis showed no clear explanation for this early loosening.ConclusionThe Selexys TH+ cup combined with the Ceramys ceramic-on-ceramic inlay coupling show an unacceptable high early revision rate. Therefore, we advice against using this combination.

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