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During the last years increasingly cementless hip endoprostheses have been implanted. Radiological wear measurement of cemented hip endoprostheses for the material couples polyethylene cup-ceramic- or metal head has been established in the literature. However, for cups encased by metal (screwing or pressfit cups), this method of measurement is not applicable. Therefore, a method has been developed to measure wear on radiographs on cementless spherical implants. The data were compared to those, obtained from conventional wear measurements on cemented hip cups. The results indicate that both techniques generate comparable results, thus validating the new technique as being suited for cementless cup implants.

biomedizinische technik

Röntgenologische Bewertung des Polyethylen-Verschleißes zementfreier Hüfttotalendoprothesen. Radiologic Evaluation of Polyethylene Wear of Cementless Total Hip Endoprosthesis