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The Journal of Bone and Joint Surgery 81:400-3 (1999)
© 1999 The Journal of Bone and Joint Surgery, Inc.

Metallosis Due to Impingement Between the Socket and the Femoral Neck in a Metal-on-Metal Bearing Total Hip Prosthesis. A Case Report*

HIROKAZU IIDA, M.D., PH.D.{dagger}, EISHI KANEDA, M.D.{ddagger}, HIDEAKI TAKADA, M.D.{ddagger}, KANJI UCHIDA, M.D.{ddagger}, KEIICHI KAWANABE, M.D., PH.D.{dagger} and TAKASHI NAKAMURA, M.D., PH.D.{dagger}, KYOTO, JAPAN

Investigation performed at the Department of Orthopaedic Surgery, Faculty of Medicine, Kyoto University, Kyoto


   Introduction
 
Late loosening of a total hip component due to osteolysis may result from polyethylene wear. For the metal-on-metal prostheses that have recently been developed, the Metasul bearing (Sulzer Medica, Winterthur, Switzerland)—which is fitted into the Müller prosthesis (Protek AG, Bern, Switzerland), the Zweymüller prosthesis (AlloPro AG, Baar, Switzerland), and other prostheses—is the most common metal-on-metal articulation. The risk of debris-related loosening may be reduced with the use of this bearing10. We report the case of a patient who had severe metallosis caused by wear of the neck of the femoral component from impingement with the rim of the acetabular component of a metal-on-metal prosthesis. This complication can occur at any time postoperatively and may not be associated with symptoms or other problems.


   Case Report
 
A seventy-two-year-old woman was seen at our clinic in November 1996 because of pain in the right thigh. She had been managed with a total hip arthroplasty . . . [Full Text of this Article]


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