アブストラクト（29巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Occlusion and Function of the Craniomandibular System
Subtitle　： BKDC CLINICAL AND RESEARCH TOPICS : DAWN OF OCCLUSION - New Aspects of Masticatory Organ
Authors　： Katsushi Tamaki
Authors（kana）　：
Organization　： Department of Prosthodontics, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 29
Number　： 2
Page　： 111-119
Year/Month　： 2001 / 9
Article　： Report
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] The purposes of this paper are to characterize the function of the craniomandibular system, to show how the system reacts to different states of occlusion and to demonstrate the effect of masticatory muscle activity and mandibular movement during the grinding motion on occlusal guidance with different guiding areas and steeper guidance on the working side. Devices of onlay-type guidance for grinding movement made of metal were fixed on the teeth of subjects from the canine to the second molar. The influence during grinding of masseter and temporal muscles on each guidance was measured by surface electromyography (EMG). Metal guidances that were steeper than the SCI value, furthermore, were fixed on canines only, and condylar movements for each of the steeper guidances were recorded with an electronic axiograph and measured by EMG. Our results show that the activity of these muscles during grinding movement increased as a function of guidance from front to back, and steeper guidance on the canine teeth was correlated with decreased muscle activity. However, steeper guidance on the canine teeth caused condylar movement toward the rear with respect to the reference position of the mandible. Interdependence of muscle activity and mandibular movement is a characteristic of the craniomandibular system (CMS).
Practice　： Dentistry
Keywords　： Occlusion, Craniomandibular System (CMS), Muscle activity, Condylar movement, Occlusal guidance