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超適合型と十字靭帯温存型インサートの二重同時全人工膝関節置換術における比較:前向き無作為化比較試験
Kushagra Pathak1, Sahil Batra1, Arpit Sahu2
1Department of Orthopaedics, All India Institute of Medical Sciences (AIIMS), New Delhi New Delhi 110029, India.
The Journal of arthroplasty
|February 11, 2026
まとめ
超適合型(UC)膝インサートは、全人工膝関節置換術(TKA)において、十字靭帯温存型(CR)インサートと比較して患者満足度を大幅に改善した。関節認識におけるこの主観的な利点は、客観的な臨床的または歩行分析測定では裏付けられなかった。
科学分野:
- 整形外科
- 生体医工学
- 人工関節デザイン
背景:
- 全人工膝関節置換術(TKA)の人工関節デザインは、ネイティブ膝機能の再現を目的としています。
- 患者報告および客観的結果に基づく、異なるTKAインサートデザイン(例:超適合型対十字靭帯温存型)の有効性に関する相反する証拠が存在します。
- TKAインサートデザイン間の患者満足度の違いを理解することは、外科的結果の最適化にとって重要です。
研究 の 目的:
- 二重同時TKAにおける超適合型(UC)と十字靭帯温存型(CR)インサートデザインの患者満足度の比較。
- UCおよびCR TKAインサート間の結果の違いを説明する可能性のある客観的パラメータの調査。
主な方法:
- 二重同時TKAを受けた53人の患者が関与した前向き、無作為化、二重盲検、第Iレベル試験。
- 患者は片方の膝にランダムに割り当てられたUCインサートを、もう一方の膝にCRインサートを受けた。
- 主要評価項目:忘れた関節スコア(FJS);副次評価項目:オックスフォード膝スコア(OKS)、膝関節学会スコア(KSS)、歩行分析、および複数の術後間隔(3、12、24か月)での安定性評価。
主要な成果:
- UCインサート群は、CRインサート群と比較して、すべての術後時点において有意に優れた忘れた関節スコア(FJS)を示した(P < 0.05)。
- FJSの最大の差は1年後の追跡調査で観察された(UC:73.2 ± 6.0 vs CR:67.5 ± 16.6;P = 0.007)。
- 評価された他の臨床的、放射線学的、または歩行パラメータについては、UC群とCR群の間で統計的に有意な差は見られなかった。
結論:
- 超適合型(UC)インサートは、TKA後2年まで、十字靭帯温存型(CR)インサートと比較して、患者報告による関節認識(FJS)を有意に改善する。
- UCインサートによる患者報告の改善は、客観的な臨床的または生体力学的測定では裏付けられなかった。
- UCインサートは、PCL温存TKAにおいてCRインサートの実行可能な代替手段であり、患者が認識する関節機能を改善する。
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