顔面および下顎骨上仮想点の運動経路の解析 : システムの精度と臨床応用例  [in Japanese] Analysis of Trajectory in Orofacial and Virtual Points on the Mandible : Accuracy Test and Clinical Application of the System  [in Japanese]

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Author(s)

    • 河野 勇治 KOHNO Yuhji
    • 昭和大学歯学部第二歯科補綴学教室 The Second Department of Prosthodontics, Showa University School of Dentistry
    • 下平 修 SHIMODAIRA Osamu
    • 昭和大学歯学部第二歯科補綴学教室 The Second Department of Prosthodontics, Showa University School of Dentistry

Abstract

We developed a kinematic method of calculating virtual points that could not be observed directly, such as condyle, molars, and the body of mandible, utilizing a motion capture system (Vicon 370, Oxford Metrics). In this study, the accuracy of the system was examined and kinematic data from test subjects were presented.<BR>Methods: Retro-reflective markers were placed on digital vernier calipers (Digimatic Caliper: CD-15 C, Mitutoyo). In addition, marker frames on which 3 markers were arranged spatially were attached to the slider of the calipers to provide a measured value of virtual points that were indicated by a stick on which 2 markers were aligned (pointers). Markers on the calipers were located and automatically tracked using six video cameras (V-133, nac) while the slider was displaced within the range of 150 mm in random directions and intervals. The video data were collected with a datastation and the three-dimensional (3 D) coordinated data were transferred to a computer. Measurements of virtual points, which were calculated from displacement of the marker frame attached to the slider, were combined with the video data of the markers.<BR>Results: High linearity was observed both in markers and virtual points during displacement of the slider. Error that was calculated from discrepancy between measurements on the calipers and the Vicon were 0.11%(marker points) and 0.35%(virtual points) respectively.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(6), 1056-1066, 1999-12-10

    Japan Prosthodontic Society

References:  23

Cited by:  6

Codes

  • NII Article ID (NAID)
    10008175254
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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