Resumo

COELHO, Ana Sofia Estima da Cunha et al. Prevalence and distribution of tooth agenesis in a pediatric population: a radiographic study. RGO, Rev. gaúch. odontol. (Online) [online]. 2012, vol.60, n.4, pp. 505-508. ISSN 1981-8637.

Objective The purpose of this study was to assess the prevalence of hypodontia and its distribution by sex, arch and quadrant, through the analysis of panoramic radiographs from the pediatric population of the Faculty of Dentistry of the University of Oporto, in Portugal. Methods Panoramic radiographs of 1,438 patients of the Faculty of Dentistry of the University of Oporto (714 boys and 724 girls between the ages of 6 and 15) were evaluated to determine the occurrence and distribution of tooth agenesis. Chi-square and Fisher's Exact Tests were performed. The level of significance was set at 5%. Results The prevalence of hypodontia was 8% (excluding the third molar). Hypodontia was found in the mandible of 74 patients (64.3%). The most commonly missing teeth were the mandibular second premolars (28.6%). The maxilla had 52.3% of the dental agenesis detected. Similarity in the distribution of missing teeth between left and right sides of the dental arches was also detected. The prevalence of oligodontia was 0.42% and the average number of missing teeth per affected child was 2.31. There were no statistically significant differences between sexes. Conclusion In a pediatric population of 1,438 patients, the prevalence of hypodontia was 8% (excluding the third molar). The results are consistent with those previously described in different populations.

Palavras-chave : Anodontia.; Panoramic radiography.; Prevalence..