年齢,股関節頸部皮質の安定性,股関節骨折のリスクとの関連
Paul M Mayhew1, C David Thomas, John G Clement
1Department of Medicine, University of Cambridge, Cambridge, UK.
Lancet (London, England)
|July 12, 2005
まとめ
老化により,特に女性では,股関節頸部皮質の薄くなり,股関節骨折のリスクが増加します. ウォーキングによる不十分な負荷は,骨を強くし,転倒を防ぐために,ターゲットを絞った運動を必要とします.
科学分野:
- 整形外科 整形外科 整形外科
- バイオメカニクス バイオメカニクス
- ゲロントロジーはゲロントロジーの学科です.
背景:
- 股関節骨折のリスクは年齢とともに劇的に増加し,局所的な屈折 (弾性不安定) が潜在的な原因である.
- 骨の構造は機械的な負荷に適応する;二足歩行では,上側側股関節首の負荷が不足すると,皮質が薄くなる可能性があります.
- 弾性不安定の年齢関連の変化を調査することは,股関節骨折の引き金を理解するために重要です.
研究 の 目的:
- 股関節首の弾性不安定性の年齢関連の増加を測定するために.
- 骨構造の年齢関連の変化が,股関節骨折リスクに寄与するかどうかを判断する.
主な方法:
- コンピュータートモグラフィー (CT) を使用して,20〜95歳の患者の77個の近隣股関節の股関節中部の骨の分布を分析しました.
- 弾性不安定性の値である臨界ストレスは,最も負荷がかかる皮質骨領域の幾何学的性質と密度に基づいて計算されました.
主要な成果:
- 正常な老化により,特に女性では,部上後部皮質が著しく薄くなり,その厚さは10年ごとに6.4%減少した.
- 女性の10年毎の臨界ストレスは13.2%減少し,弾性不安定に対する感受性の増加を示しています.
- この年齢関連の薄くなり,骨粗鬆症とは無関係に,股関節のエネルギー吸収能力が低下し,股関節骨折患者はさらに不安定さを示した.
結論:
- 老化により,女性の部脆弱性が増加し,これは,上側側皮質の負荷が不足しているため,縮性薄くなり,縮性薄くなります.
- ウォーキングは,上部股関節首に十分な負荷を及ぼさない可能性があり,強化運動の必要性を示唆しています.
- ターゲットを絞った運動介入は,潜在的に年齢に関連する骨の脆弱性を軽減し,股関節骨折の発生率を減らすことができます.
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