title: Distribution of malocclusion types in 7-9-year-old Iranian children.
abstract: This study assessed the malocclusion types, very severe crowding and need for serial extraction among a random sample of 7-9-year-old children in Shiraz, Islamic Republic of Iran. Of the 3776 children 30.6% had normal occlusion, 47.4% class I malocclusion, 13.7% class II division 1 malocclusion (male/female ratio 3:2), 1.0% class II division 2 malocclusion (male/female ratio 3:1) and 2.1% class III malocclusion. Among the children examined, 47.9% had crowding problems and 14.7% of them had class I malocclusion with very severe crowding-more girls (17.3%) than boys (12.1%). No correlation was observed between the types of malocclusion and family size, parents' occupation or level of education.
authors.affiliation: Department of Orthodontics, Faculty of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran. momenish@sums.ac.ir
authors.forename: S M
authors.initials: SM
authors.lastname: Danaie
authors.forename: Z
authors.initials: Z
authors.lastname: Asadi
authors.forename: P
authors.initials: P
authors.lastname: Salehi
mesh_terms: D002648:Child; D003753:Dental Health Surveys; D005191:Family Characteristics; D005260:Female; D006301:Health Services Needs and Demand; D006801:Humans; D007492:Iran / Q000453:epidemiology; D008297:Male; D008311:Malocclusion, Angle Class I / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D008312:Malocclusion, Angle Class II / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D008313:Malocclusion, Angle Class III / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D009790:Occupations / Q000706:statistics & numerical data; D010290:Parents; D011159:Population Surveillance; D015995:Prevalence; D011446:Prospective Studies; D012494:Sampling Studies; D012690:Serial Extraction; D017678:Sex Distribution