Report of a Dental Status Survey in Model Primary Schools for an Occlusal Guidance Project in Yamanashi Prefecture

(II): Results of Examination for Stomatognathic Function

Abstract

As a part of an occlusal guidance project promoting the“8020”Campaign, we performed examinations of stomatognathic function and oral habits in a model primary school for occlusal guidance from childhood to obtain better permanent dentures.
The following results were obtained.
1. The maximum occlusal force and the maximum opening range of mandibular increased with age.
2. The incidence of temporamandibular joint noise was 9.3% in all children and high at ages 6 and 12.
3. The incidence of breathing through the mouth. was 27.4% in all children, and that of the mouth opening at rest was 34.4%.
4. The incidence of abnormal swallowing was 18.0% in all children, and that of the tongue thrust habit was 14.5%. Each incidence decreased with age.