Japanese Maxillary First Molar Root Canal Morphology: An Ultrastructural Study Using Micro-Computed Tomography

The present study used ultra-high-resolution micro-computed tomography (CT) to clarify the classification of root canal morphologies and incidence accessory canals in maxillary first molar mesiobuccal (MB) root. Aspects relationship with reinfection during or after endodontic treatment were also investigated. Molar three-dimensional structure, pulp cavity, examined on micro-CT images 100 Japanese molars from collection at Department Anatomy, Tokyo Dental College. most common Vertucci’s main mesial was Type I, followed by V. Accessory 75.0%, which higher than previously reported; however, majority such within apical 3 mm. Many observed even single suggesting that existence should always be considered if diagnostic imaging clearly shows a I classification.