(PR99) Root Canal Anatomy of Mandibular Incisors with Vertucci's Type lll Configuration: A Micro-CT Study

The aim of this study was to evaluate the root canal anatomy of mandibular incisors with Vertucci’s type III configuration. 40 mandibular incisors were scanned using a micro-CT to measure canal and dentin volume, bifurcation and merging levels, minor and major diameters, long-short diameter ratio, dentin thickness, degree of curvatures, and number of foramens. The apical third showed lower volume of canal and dentin. The bifurcation with the formation of buccal and lingual canals presented a mean of 3.75 mm extension. The cement-enamel junction, bifurcation and merging levels showed major diameter (P <0.05). The round shaped canals were found in buccal (67.5%), lingual (85%) and apical sections (55%). In apical section dentin thickness ranged from 1.02 mm to 0.52 mm. No specimen showed root curvature and 82.5% of mandibular incisors presented single apical foramen. The morphologic aspects of root canal bifurcation and merging in mandibular incisors Vertucci’s type III do not present a consistent pattern.