Morfología interna y externa de terceros molares extraídos, clínica UCSG - 2019.

Abstract

Introduction: One of the main causes of endodontic failure is related to the lack of knowledge of the operator by not identifying all the conductors present in the dental piece. The lack of knowledge of the internal anatomy of the third molars demonstrates why they are the least treated pieces by specialists. Objective: To investigate and describe the internal and external morphology of the third molars. Materials and methods: 120 third molars, 65 superior and 55 inferior, collected in the UCSG clinic were used. The teeth were diafanized using Robertson technique. The parameters evaluated were the number of roots, the number of canals, the arrangement of the canals, the presence of isthmus and the presence of C shaped canals. Results: 78% of third mandibular molars exposed one root. 38% present two roots. The molars with two roots have the most variable internal morphology of their canals, reaching 1 to 4 canals. 65% of maxillary molars have one root, 22% have two roots, and 13% 13% have three roots. Third mandibular molars can reach from one to four canals. Conclusions: The maxillary third molars present more frequently one root that has about 1 to 4 ducts with Vertucci type II as the most frequent, while the mandibular ones frequently have 2 roots with 1 to 5 ducts where the most common is Vertucci type II in the Mesial root and type I in the distal root. The isthmus was predominantly found in maxillary third molars. The C-shaped ducts predominated in the maxillary and mandibular molars with two roots.