Avaliação tridimensional do segundo molar permanente impactado: tomografia computadorizada do feixe cônico

Abstract

The present study proposed to evaluate unruptured permanent second molar in cone beam computed tomography images of adolescents and adults. This is a cross-sectional observational study of tomographic images of impacted permanent second molars obtained from 16 Brazilian patients, both sexes, of which 13 presented unilateral impaction and 3 bilaterally, totaling 19 images. The highest prevalence occurred in the mandible of males with an average age of 20 years. The angles observed were distoangular (n=7/36.8%), horizontal (n=5/26.3%), vertical (n=4/21.1%) and mesioangular (n=3/15,8 %). Regarding root dilaceration, the mesial (n=12/67%), mesial and distal (n=3/15.8%) and fused (n=2/8.6%) roots of the impacted second molars showed convergence dilaceration , three of which had accentuated curvatures starting in the middle third of the root. The tomographic images of all 2MPs evaluated revealed an intact lamina dura, without ankylosis. The data found that 89.4% of patients had an adjacent third molar in the second molar’s alveolar space. An association was observed between the lack of space in the dental arch and the presence of the third molar in the second molar’s space (p=0.018).