Abstract
To determine the normative orthodontic treatment need among 12-year-old Brazilian schoolchildren, in the municipality of Juiz de Fora, Minas Gerais, Brazil, and compare with the need as perceived by the children themselves and their parents or caregivers, assessing putative associated sociodemographic factors. Four hundred and fifty one children without a previous history of orthodontic treatment were randomly selected from a population of 7,993 schoolchildren regularly attending the public and private educational sectors of the municipality of Juiz de Fora, Minas Gerais, Brazil. The prevalence of normative orthodontic treatment need in 12-year-old children, assessed with the Dental Aesthetic Index (DAI) was 65.6% (n = 155). The need perceived by the caregivers was 85.6%, and by the children was 83.8%. Only the perception by the caregivers maintained a significant correlation with the normative need of treatment when adjusted to the parents' schooling and economical level (p = 0.023). There is a high prevalence (65.6%) of malocclusion requiring orthodontic treatment in 12-year-old Brazilian schoolchildren. The most prevalent malocclusions in the study were: Crowding, Class II molar relationship and increased overjet. There was no significant correlation between the Index of Orthodontic Treatment Need - Aesthetic Component (IOTN-AC) related to dental aesthetic perception and the normative treatment need assessed with the DAI.
Highlights
Four hundred and fifty one children were selected from a population of 7,993 schoolchildren regularly attending the public and private educational sectors of Juiz de Fora, a middle-sized city in the state of Minas Gerais, in Southeastern Brazil
Sample size was calculated based on demographic data from SB Brasil 2003,4 taking into account the representativeness for a 58.14% estimated malocclusion prevalence rate at the age of 12 years, with 95% confidence interval and 5% standard error
Normative orthodontic treatment need was observed in 296 (65.6%) study subjects, a figure similar to the ones reported by other researchers.[1,18]
Summary
Four hundred and fifty one children were selected from a population of 7,993 schoolchildren regularly attending the public and private educational sectors of Juiz de Fora, a middle-sized city in the state of Minas Gerais, in Southeastern Brazil. The stratified random sample was represented, at the first stage, by a sample of selected schools, out of a universe of 150 schools in the municipality. In order to assure sample representativeness, the distribution of the children in proportion to the population in both sectors was established through data from sampling calculation. In order to assure similar participation odds for each child, a random raffling of the individuals was performed.[14] Sample size was calculated based on demographic data from SB Brasil 2003,4 taking into account the representativeness for a 58.14% estimated malocclusion prevalence rate at the age of 12 years, with 95% confidence interval and 5% standard error.
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