Three-Dimensional Evaluation of Impacted Mandibular Canines and Adjacent Structures Using Cone Beam Computed Tomography: A Retrospective Study.

This study aimed to evaluate impacted mandibular canines and adjacent dentoalveolar structures using cone beam computed tomography. Measurements were made on CBCT images of 54 impacted mandibular canines. Parameters such as the position of the canine teeth, follicle diameter, their relationship with the mental foramen and the incisive mandibular canal, resorption in the adjacent teeth, interpremolar and intermolar width, arch symmetry, and mesiodistal width of the canine teeth were investigated. The resorption rate in adjacent permanent teeth was recorded as 14.8%. No statistically significant difference was found between the follicle size of the canine tooth and the resorption in the adjacent teeth ( > 0.05). Cortical bone perforation was found in 83.3% of individuals with impacted mandibular canines. Teeth in contact with the mental foramen and incisive mandibular canal were found in 11.1% and 6.5%, respectively. There was no statistically significant difference in the interpremolar and intermolar width on the impacted and non-impacted sides ( > 0.05). However, a significant difference was observed in the mesiodistal width of the canines and arch length on the impacted and non-impacted sides ( < 0.05). No correlation was found between root resorption in adjacent teeth and follicle size. Cortical bone perforations were observed in most impacted canines, and some were in contact with the mental foramen and the incisive mandibular canal. Although transversal arch widths were similar on the impacted and non-impacted sides, differences in arch length and mesiodistal widths may affect arch symmetry and should be considered in treatment planning.