Analysis of six degrees of freedom mandibular movement and three-dimensional reconstruction of the condyle using CT images

1995 Fiscal Year Final Research Report Summary

• Project/Area Number: 06671978
• Research Category: Grant-in-Aid for General Scientific Research (C)
• Allocation Type: Single-year Grants
• Research Field: 補綴理工系歯学
• Research Institution: Aichi-Gakuin University
• Principal Investigator: KAWAGUCHI Toyozo Aichi-Gakuin University School of Dentistry, Professor, 歯学部, 教授 (60064820)
• Co-Investigator(Kenkyū-buntansha): USAMI Hiroshi Aichi-Gakuin University School of Dentistry, Assistant Professor, 歯学部, 講師 (00231176) ; MORI Takashi Aichi-Gakuin University School of Dentistry, Associate Professor, 歯学部, 助教授 (00159188)
• Project Period (FY): 1994 – 1995
• Keywords: Mandibular movement / Reconstruction of the condyle / CT images / 顆頭運動

Research Abstract

The purpose of this study was to analyze mandibular movements and reproduce condylar movements in a three dimensional visual image.
A new device (CT-device) was developed to match a three-dimensional reconstruction of the condyle with mandibular movements. Mandibular movements of normal dentitions were recorded in six degrees of freedom with MM-JI-E.
Three-dimensional reconstruction of condyles were made from corrected axial CT images. The morphological data of the condyles was matched with the data of the mandibular movements, and then these condyle movements were described on the screen.
The following results were obtained : With the new device (CT-device) it was possible to match three-dimensional reconstructions of the condyle with mandibular movements accurately. And the condylar movements were reproduced three-dimensionally on the screen from the intercuspation freely chosen by the subject.