Analysis of the root canal morphology of mandibular premolars using cone-beam computed tomography

Stephânia Carolina Martins SERQUEIR, Carolina Oliveira de LIMA, Karina Lopes DEVITO, Jefferson J. C. MARION, Maíra do PRADO e Celso Neiva CAMPOS

Introduction: The success of an endodontic treatment depends primarily on cleaning and shaping of the root canal system. Therefore, the anatomy of the root canal system should be known in detail. However, this anatomy is complex and varies morphologically in different populations. This study evaluated the root canal anatomy of mandibular premolars in a Brazilian population using cone beam CT (CBCT). Methods: CBCT axial, coronal and sagittal slices of 426 mandibular premolars were analyzed. Number of roots and canals, as well as Vertucci type, were recorded using a spreadsheet. Associations between sex, number of roots, and Vertucci type were analyzed using a chi-square test (p<0.05). Results: Of the 426 teeth evaluated, 224 (52.6%) were first premolars and 202 (47.4%), second premolars. Most first premolars (93.3%) and all second premolars had one root. Vertucci types I, II and V were found, and type I was the most frequent. Type V was only found in two-rooted first premolars (p<0.001). There were no significant associations between number of root and sex (p=0.182). Conclusion: Most mandibular premolars had one root and were Vertucci type I, which indicates that there is little anatomic variation of these teeth in the Brazilian population under study. There was no sex predilection for number of roots or Vertucci type.

Keywords: Anatomy. Premolar. Root canal obturation

How to cite: Serqueira SCM, Lima CO, Devito KL, Marion JJC, Prado M, Campos CN. Analysis of the root canal morphology of mandibular premolars using cone-beam computed tomography. Dental Press Endod. 2020 Jan-Apr;10(1):20-6.

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