title: Assessment of malocclusion of Japanese junior high school pupils aged 12-13 years in Iwate prefecture according to the Dental Aesthetic Index (DAI).
abstract: The purpose of this investigation is to grasp the actual condition of malocclusion in Japanese junior high school pupils using the Dental Aesthetic Index (DAI). A total of 218 junior high school pupils aged 12-13 years were examined according to DAI. About 40% of the subjects had incisal crowding. The percentage of subjects with incisal spacing was 24%, and 71% of them had diastema of 1 mm or more. The percentage of subjects with anterior irregularity on the upper and lower arch was 39% and 33%, respectively. The percentage of subjects with anterior maxillary overjet and mandibular protrusion of 1 mm or more was 85% and 6% respectively. Dislocation by more than a half-cusp in the proximal or distal relationship in the molars was observed in 26% of all subjects. Mean +/- SD of DAI score was 25.3 +/- 7.3.
authors.affiliation: Department of Preventive Dentistry, Iwate Medical University, School of Dentistry, Morioka, Japan.
authors.forename: F
authors.initials: F
authors.lastname: Takahashi
authors.forename: A
authors.initials: A
authors.lastname: Abe
authors.forename: Y
authors.initials: Y
authors.lastname: Isobe
authors.forename: Y
authors.initials: Y
authors.lastname: Aizawa
authors.forename: N
authors.initials: N
authors.lastname: Hanada
mesh_terms: D000293:Adolescent; D002648:Child; D003753:Dental Health Surveys; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008310:Malocclusion / Q000145:classification / Q000453:epidemiology*; D013334:Students