Three-dimensional <i>In Vivo</i> Contact Analysis of the Wrist Joint during Wrist Motion

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  • SASAGAWA Keisuke
    Department of Mechanical and Production Engineering, Niigata University
  • SAKAMOTO Makoto
    Department of Health Sciences, Niigata University School of Medicine
  • YOSHIDA Hidenori
    Department of Health Sciences, Niigata University School of Medicine
  • KOBAYASHI Koichi
    Department of Health Sciences, Niigata University School of Medicine
  • TANABE Yuji
    Department of Mechanical and Production Engineering, Niigata University

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  • Three-dimensional in vivo contact analysis of the wrist joint during wrist motion

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Abstract

The wrist joint is condyloid and capable of movement through two axes: palmar/dorsal flexion and radial/ulnar deviation. Knowledge of in vivo joint mechanics is important for understanding pathological mechanisms and the treatment of various joint problems. The purpose of this study was to investigate the in vivo wrist joint mechanism during wrist motion. In vivo wrist joint contact and the kinematics of the scaphoid and lunate during palmar/dorsal flexion and radial/ulnar deviation were examined using magnetic resonance imaging (MRI). The wrist joints of 15 healthy young volunteers were scanned at 8 positions (.30 deg of palmar flexion; neutral; 30, 60, and 90 deg of dorsal flexion; .20 deg of radial deviation; neutral; and 20 deg of ulnar deviation). Contact of the wrist joint was estimated quantitatively from the derived MR images. Using three-dimensional surface models of the carpal bones, the kinematics of the scaphoid and lunate were analyzed three-dimensionally.

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