Results: Out of 120 patients included in the study sample including 120 CT Conbeam images, 122 roots of the mandibular second molars were found to have extradilation, in terms of the location of the appearance, the rate of extraresorption was high. The highest was at the position of 1/3 of the neck with 82 teeth (67.2%), followed by the position of the middle third of 31 teeth (25.4%), and the lowest was at the position of the apical 1/3 consisting of 9 teeth (7.4%).