title: Prevalence of Orthodontic Treatment Need and Occlusal Traits in Schoolchildren.
abstract: Background. Widespread use of the IOTN along with detailed study of occlusal traits is suitable for planning community dental health resources. Objectives. The aim of current study was to assess the need for orthodontic treatment among school children of Tehran by means of the Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN) and also to evaluate the occlusal traits of the subjects. Methods. 684 (343 boys and 341 girls) school children, 15 to 17 years of age, were selected at random from 12 schools to represent the four main areas of Tehran. The final sample who met the inclusion criteria comprised 643 subjects (322 males and 321 females). Malocclusion was determined with the Index of Orthodontic Treatment Need. The IOTN grades were statistically compared in the two genders using chi-square test. Results. Orthodontic treatment need, using the DHC, was found in only 9.0 per cent of the children. The prevalence of Angle Class I malocclusion in this study was higher than other malocclusions (65.2 per cent), followed by crowding in 62.7 per cent of the subjects. Conclusion. Orthodontic treatment need for Tehran high school students was relatively lower than that reported in most recent studies in Europe.
authors.affiliation: Fellow of Orthognathic Surgery, Department of Orthodontics, Center of Craniofacial Research, Islamic Azad University, Dental Branch, No. 2713, Vali Asr Street, Tehran 1966843133, Iran.
authors.forename: Abdolreza
authors.initials: A
authors.lastname: Jamilian
authors.affiliation: Department of Orthodontics, Islamic Azad University, Dental Branch, Tehran 1946853314, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Darnahal
authors.affiliation: Department of Orthodontics, Islamic Azad University, Dental Branch, Tehran 1946853314, Iran.
authors.forename: Elnaz
authors.initials: E
authors.lastname: Damani
authors.affiliation: Department of Periodontics, Islamic Azad University, Dental Branch, Tehran 1946853314, Iran.
authors.forename: Maziar
authors.initials: M
authors.lastname: Talaeipour
authors.affiliation: National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran.
authors.forename: Zinat
authors.initials: Z
authors.lastname: Kamali