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RGO - Revista Gaúcha de Odontologia

Print version ISSN 0103-6971On-line version ISSN 1981-8637


MORAIS, Carlos Henrique de et al. Malocclusion in schoolhildren aged 7-12 years old in Minas Gerais, Brazil. RGO, Rev. Gaúch. Odontol. [online]. 2016, vol.64, n.2, pp.164-170. ISSN 1981-8637.


The aim of the study was to determine prevalence of malocclusion and the inter- and intra-arch relations in schoolchildren of 7-12 years of Vazante, Minas Gerais, Brazil.


In the inter-arch relations the sagittal, vertical and transverse aspects were evaluated, and in the intra-arch relations, diastemas, crowding and tooth losses were determined in 670 children. The maloclussion was classified as Class I , II and III according to Angle, based on the position of the first molars. For this study, the sample was divided into two age groups: children from 7 to 9 years and children from 10 to 12 years old.


A similar percentage of individuals with Class I and II was found in the two age groups evaluated. A higher percentage of Class III individuals was observed in the age group from 10 to 12 years. The presence of cross bite, anterior open bite, diastemas, crowding and early primary tooth loss was prevalent in the age groups of 7 and 9 years. Deep bite, posterior cross bite and early loss of permanent teeth prevailed in the age from 10 to 12 years.


It could be concluded that there was a high rate of malocclusion in children and the sagittal relation was maintained in the two periods evaluated. A larger number of manifestations of anterior open bite were observed in the age group of 7 to 9 years, and overbite in the Group from 10 to 12 years. In the transverse relation there was an increase in cross bite from the first to second transitory period.

Keywords : Dentition mixed; Malocclusion; Orthodontics.

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