• Arch Orthop Trauma Surg · Jan 1991

    Comparative Study

    Uncoated polyethylene RM acetabular component versus Müller cemented acetabular component. A 4- to 8-year follow-up study.

    • M Krismer, M Fischer, T Klestil, and B Frischhut.
    • Department of Orthopaedic Surgery, University Clinic of Innsbruck, Austria.
    • Arch Orthop Trauma Surg. 1991 Jan 1; 110 (4): 195-9.

    AbstractComparable patient populations with 160 uncoated RM acetabular cups and 263 cemented Müller standard acetabular cups were submitted to survival-time analysis in a retrospective study with a mean follow-up of 5.3 years for the RM cup and 6.1 years for the Müller cup. After 7-8 years 12% of the RM cups and 4% of the Müller cups had been exchanged, 40% and 15% respectively were loose. The poor performance of the RM cups is ascribed to additional external polyethylene wear, which leads to the formation of granulomas and destroys the weight-bearing osseous structures. Similar granulomas also develop on the proximal stem and thus endanger the same.

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