The relationship between increased hip range of motion, wear, and locking mechanism failure in the Harris-Galante acetabular component |
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Authors: | Imai Hiroshi Mashima Naohiko Takahashi Toshiaki Yamamoto Haruyasu |
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Institution: | aDepartment of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Ehime, Japan |
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Abstract: | We performed both clinical and radiographic evaluations of 178 patients (190 hips) who had undergone cementless total hip arthroplasties using Harris-Galante I/II porous cups after an average 12-year follow-up period (range, 8-18 years). We revised 15 Harris-Galante I/II porous cups (7.8%), and the locking mechanism was broken in 10 revised cups (67%). There was a significant association between locking mechanism failure and linear polyethylene wear. We observed a significant positive correlation between linear polyethylene wear and increased ranges of motion such as flexion, adduction, and external rotation at the last follow-up visit after the primary operation. Increased ranges of motion seen in Asians induced higher linear polyethylene wear and locking mechanism failure due to impingement of the neck and cup. |
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Keywords: | total hip arthroplasty acetabular component polyethylene wear range of motion |
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