等速性筋力測定機を用いた仰臥位前側方アプローチにおける人工股関節全置換術後の股関節周囲筋筋力評価

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  • トウソクセイ キンリョク ソクテイキ オ モチイタ ギョウガイ マエ ソクホウ アプローチ ニ オケル ジンコウ コカンセツ ゼン チカン ジュツゴ ノ コカンセツ シュウイキン キンリョク ヒョウカ

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<p>[Purpose] There have been various studies on the evaluation of periprosthetic hip muscles after total hip arthroplasty, and many reports have evaluated them using isometric muscle strength measurement with a hand-held dynamometer. In this study, we evaluated muscle strength from preoperative to 1 year postoperatively using an isokinetic muscle strength measurement device, and examined the correlation with changes in patient stance evaluation. [Methods] BIODEX SYSTEM 4 (Biodex Medical Systems, Inc., USA) was used to measure muscle strength and the Japanese Orthopaedic Association Hip Disease Assessment Questionnaire (JHEQ) was used to evaluate patient stance. The correlation between muscle strength and JHEQ score was investigated. [Results] The periprosthetic muscle strength of both the operative and nonoperative sides of the hip improved in all muscles at six months and one year postoperatively compared to that of preoperatively. Each score of the JHEQ improved significantly in the first six months and one year after surgery, but there was no significant difference between the first six months and one year after surgery. Weak positive correlations were found between the periarticular hip muscles and the movement scores of JHEQ, and significant differences were found in flexion and abduction muscle strength at six months postoperatively and flexion muscle strength at one year postoperatively. [Conclusions] Both the operated and nonoperated sides showed improvement in the periarticular hip muscles from six months to one year postoperatively. Improvement in movement scores on the JHEQ was associated with periprosthetic hip muscle strength, suggesting that improvement in muscle strength may be important in improving patient satisfaction．</p>

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