Oral Pathologies associated with impacted second molar: Cone beam computed tomography study

This study aimed to evaluate oral pathological processes and/or dental anomalies associated with unerupted permanent second molar in cone beam computed tomography images of adolescents and adults. This is a retrospective cross-sectional study in which unerupted second permanent molars were analyzed using tomographic images obtained from 16 brazilian patients. Thirteen of whom had second permanent molars with unilateral impaction and 3 bilaterally, totalling 19 tomographic images. The highest prevalence occurred in lower permanent second molars unilaterally on the left side in male individuals with an average age of 20 years. The most common dental anomalies associated with the impacted permanent second molar were eruptions disorders in all adjacent third molars evaluated. Dental anomalies of number were verified in 2 (10.5%) cases of supernumerary teeth and of shape in 14 (73.7%) cases of root dilacerations. No ankylosis process was observed. Among the oral pathologies, 3 (15.8%) were external root resorption in the adjacent first permanent molar and 2 (10.5%) revealed hypodense images with cystic appearance. The position of the impacted second permanent molar was not associated with angulation of the adjacent third molar and oral pathologies (p> 0.05).