August 12, 2025Essentials of DentistryOpen Access

Retrospective Analysis of the Prevalence of External Root Resorption in the Adjacent Mandibular Second Molar Due to Impacted Mandibular Third Molar Using Cone-Beam Computed Tomography

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Retrospective analysis found external root resorption in 20.5% of adjacent mandibular second molars, suggesting third molar positioning impacts risk.

External root resorption affected 20.5% of analyzed teeth, indicating a significant prevalence among impacted teeth.
Most resorption cases (75.6%) were localized in the cervical region, raising concerns for early diagnosis.
Analysis included 400 teeth from 247 patients using cone-beam computed tomography to evaluate relationships.
Findings suggest that mesioangular and horizontal positions of mandibular third molars increase risk for adjacent molars.

Eren et al. (2025) studied this question.

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Retrospective analysis found external root resorption in 20.5% of adjacent mandibular second molars, suggesting third molar positioning impacts risk.