アブストラクト（35巻1号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Development and Orthodontic Treatment of Skeletal Class III Malocclusion without Surgical Intervention
Subtitle　： BKDC CLINICAL AND RESEARCH TOPICS: New Concepts and Treatment Approach to the Different Types of Malocclusions
Authors　： Sadao Sato, Susumu Akimoto, Hisaaki Shinji, Eliana Midori Tanaka, Ales Celar*
Authors（kana）　：
Organization　： Department of Craniofacial Growth and Development Dentistry, Kanagawa Dental College, *Department of Orthodontics, Medical University of Vienna, Bernhard Gottlieb Dental Clinic
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 35
Number　： 1
Page　： 51-63
Year/Month　： 2007 / 3
Article　： Report
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] In this article, the development of Class III open bite malocclusion is explained from a human evolutional perspective. The authors focus on vertical development of the craniofacial complex with its hyperdivergent tendency. The position and inclination of the occlusal plane are affected primarily by the posterior occlusal vertical dimension. On the basis of this principle, steepening of the occlusal plane (inclined postero-superiorly) causes the development of a Class II malocclusion and concomitantly the mandible adopts a retruded position. Particularly, the cant of the upper posterior occlusal plane - upper second premolar to upper second molar at the occlusal surface - is considered one of the most important determinants for the antero-posterior position of the mandible. On the other hand, when the occlusal plane is oriented almost horizontally or becomes abruptly flatter, a Class III malocclusion will develop as a result of the inducing anterior rotational adaptation of the mandible. Depending on the skeletal and neuromuscular adaptation capacity, an open bite malocclusion may also appear if there is an imbalance in the functional adaptation of the mandible to maxillary occlusal surfaces that continuously descend during vertical growth in order to achieve proper functional occlusion, which also induces excess or less hyperdivergency of the lower face.
Practice　： Dentistry
Keywords　： Human craniofacial skeleton, Basicranial flexion, Occlusal vertical dimension, Class III malocclusion, Open bite