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The good biomechanical and tribological properties, together with the excellent biocompatibility, of ceramic-on-ceramic components, make them a preferential choice for total hip replacement surgery, at least in Europe. We report on a man admitted as an outpatient with painless grating in the hip one year after replacement of a ceramic femoral head, but not of the ceramic inlay. Clinical and radiological findings were indicative of a broken liner. This was confirmed during revision surgery, during which it was replaced by a polyethylene inlay; although the ceramic head appeared intact, it was replaced by a metal head. Inspection of the surface of the broken liner in the scanning electron microscope (SEM) revealed signs of material failure. We recommend careful inspection of ceramic-on-ceramic articulating components during total hip revision surgery and if there is any uncertainty, replacement of both so as to avoid premature failure.

biomedizinische technik

Bruchanalyse eines Keramik-lnlays. Ist bei einem Hüftendoprothesenwechsel mit der Gleitpaarung Keramik-Keramik der Wechsel nur eines korrespondierenden Partners sinnvoll ? / Fracture analysis of a ceramic liner. Is Replacement of only one of the Ceramic-on-Ceramic Components During Total Hip Revision Justified?