当科におけるセメントレスステムを用いた人工股関節再置換術の治療成績

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  • Clinical Outcome of Revision Hip Arthroplasty with Cementless Stem

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We report the clinical and radiographic outcome of patients after revision surgery with cementless femoral components at our hospital. From 1998 to 2009, fifteen hips of 14 patients who underwent revision surgeries of femoral components and could be followed up for one year or more were enrolled in this study. There were two men in two hips, and 12 females in 13 hips, and their mean age at surgery was 68.3 years old. The mean follow-up duration was 5.1 years. According to the Paprosky classification, two hips were classified as type I, 11 hips as type II, and two hips as type IIIA. There were no cases of type IIIB or IV. The JOA hip score improved from 57.0 points to 78.7 at the final follow-up. Stem subsidence over 3 mm and stress shielding were seen in one and six hips, respectively. According to the criteria of Engh et al., 14 hips were classified with bone-ingrowth fixation, and one with stable fibrous fixation. There were no hips with unstable stem nor cases with serious complications after the revision surgeries.

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