新しい L5-S1 後部固定システムの生体力学について: 有限要素の研究
Aline F Gouveia1,2, Paulo R Fernandes1, André P G Castro1,3
1IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal.
まとめ
L5-S1セグメントの新しい固定システムは 退化した脊椎の運動とストレスを効果的に軽減します 特にL5-S1レベルでの 低腰痛の治療には 有望な結果が出ています
科学分野:
- 生物医学工学
- 脊髄の生体力学
- 整形 術
背景:
- 腰痛は人口の70%以上に影響します
- 脊椎間板の後部装置は,足首の螺旋システムに侵襲性の少ない代替手段を提供します.
- 既存の器具はL5-S1脊髄部に適していないことが多い.
研究 の 目的:
- L5-S1脊髄レベルに合わせた固定システムを設計する.
- 退化した脊髄部位に このシステムの影響を評価する
- 脊髄運動とストレスの分布に対するシステムの影響を評価する.
主な方法:
- L4-S1脊髄セグメントの有限要素モデルの開発
- 健康的,軽度変性,中度変性という 3つの臨床段階を含みます.
- 短期間と長期の手術後の段階をシミュレーションし,変性と組み合わせた.
主要な成果:
- 椎間板の動きが著しく低下し,折り畳み/伸縮の96%まで,横向の曲折の80%まで,軸の回転の83%まで.
- 円盤領域における最大主張の大幅な減少:80% (屈折),76% (伸縮),78% (横折り).
- L4- L5 セグメントの移動性の最小限の変化,隣接ディスク疾患のリスクの減少を示唆します.
結論:
- 設計されたL5-S1固定システムは,脊椎の動きとストレスを効果的に軽減します.
- 特にL5-S1レベルでの腰痛の治療に期待できる結果です.
- さらに実験的,計算的,臨床的な研究が必要である.
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