910 MRIを用いたヒト手関節の接触領域解析(J04-2 臨床医歯学における非・低侵襲計測技術の展開(2) MRIおよびX線応用計測,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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The aim of this study is to investigate in vivo joint contact mechanisms of the human wrist by magnetic resonance imaging (MRI). We analyzed the wrist joint cartilage contact areas and distributions during flexion/extension quantitatively. MR scanning was performed on the wrist of ten subjects by 1.5T-MRI system. The wrist joint was scanned at the 5 positions (palmer flexion -30 deg, neutral 0 deg, and dorsal flexion 30, 60 and 90 deg). The quantitative analysis of wrist joint contact mechanisms was performed for radioscaphoid and radiolunate joint. The mean contact area at radioscaphoid joint was greater than that at radiolunate joint in all wrist positions (40.3 and 7.8 mm^2 for neutral position at radioscaphoid and radiolunate joint, respectively). There were flexion/extension angles that radiolunate joint contact was not confirmed. The contact distributions indicated by 3D models of scaphoid and lunate were shifted during flexion/extension.
社団法人日本機械学会の論文
2008-08-02