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The purpose of this study was to propose newly defined parameters of finite helical axis (FHA) analysis for mandibular kinematics. One subject without signs and symptoms of temporomandibular disorders and with normal occlusion was selected. The opening and closing movement of the mouth was recorded by an opto-electric system (TRIMET system). Subsequently, the FHA parameters were calculated. In this study, the direction vector and position vector of the FHA, the rotation angle of the FHA and the translation along the FHA were used as the FHA parameters. The newly defined FHA parameters demonstrated the existence of translational movement of the condyle at the beginning of the opening phase. Furthermore, the FHA position vector clarified the ratio of rotation component to translation component during opening and closing movement. The FHA parameters developed in this study provide detailed information mandibular kinematics.
- 一般社団法人 日本顎関節学会の論文
一般社団法人 日本顎関節学会 | 論文
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