アブストラクト（33巻1号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Cephalometric Reconsideration of the Relationship between the Craniofacial and the Occlusal Plane in Japanese and American Adults
Subtitle　： ORIGINAL ARTICLE
Authors　： Satoshi Ino, Minoru Toyoda, Makoto Ukiya
Authors（kana）　：
Organization　： Division of Prosthetics, Department of Oral and Maxillofacial Rehabilitation, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 33
Number　： 1
Page　： 3-7
Year/Month　： 2005 / 3
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] As there are racial differences of skeletal growth pattern in the cranium and the mandible, setting methods for the occlusal plane appropriate for various races are required. The aim of this study was to revaluate the racial differences in the positional relationship between the skeletal form in the craniofacial and occlusal plane in normal adult Japanese and Americans using 80 lateral cephalometric radiograms in the archives of the department of prosthodontics at Kanagawa Dental College. In this study, the facial skeleton was analyzed by determining certain linear dimensions. The following landmarks and measuring items were used : the distance between the key ridge (KR) and the FH plane (KR-FH), the SN plane (KR-SN), the occlusal plane (KR-Occ), and the mandibular plane (KR-Mand). In addition, the ratio of KR-Occ and KR-Mand was calculated. There were no significant differences in KR-FH and KR-SN in all subjects. However, there was a significant different between KR-Occ and KR-Mand in racial and gender comparison. This, in particular, refers to the lower facial height, where the mandible is at a more postinferior position in the male than female, and amongst Japanese in comparison with Americans. Furthermore, it was found that the common proportional relationship of the functional occlusal plane is positioned at the center of the site where the masseter muscle is attached. It was concluded that the cephalometric analyses used were suitable for diagnostic purposes, as far as race and gender is taken into account.
Practice　： Dentistry
Keywords　： Racial differences, Cephalometrics, Linear dimension, Key ridge, Functional occlusal plane