Resumo

BETANCOURT, P.; ARACENA ROJAS, S.; NAVARRO CACERES, P.  e  FUENTES, R.. Anatomical configuration of canalicular system in mesiobuccal root of maxillary first molar. Av Odontoestomatol [online]. 2015, vol.31, n.1, pp.11-18. ISSN 2340-3152.  https://dx.doi.org/10.4321/S0213-12852015000100002.

Introduction: Permanent maxillary first molar is the tooth that presents the most complex morphological variation, which is reflected in a higher rate of clinical failure. One of the main causes of endodontic treatment failure is the inability to locate the secondary mesiobuccal canal and the ignorance of their morphology. The aim of this study was to determine, in vitro, the configuration of MB2 canal present in the mesiobuccal root of the first maxillary molar, through periapical radiographs. Methods: Sixty-two maxillary first molars were selected. After this, we proceeded to take initial periapical radiographs of each tooth in mesio-distal and bucco-palatal faces. The molars were approached until pulp chamber and canals were permeabilized. In order to demonstrate the anatomy of root canals, a Hedstrom file n^o 0,8 or 10 was positioned over the MB1 canal and a K- flex file n^o 0,8 or 10 over the MB2 canal. Specimens were subjected to a periapical radiograph as a final control in the same mesio-distal and bucco-palatal faces. Results: 30,38% of teeth had type I canal system, 41,07% were type II, 28,57% had type III and 0% type IV. The frecuency of the second mesiobuccal canal was 69,64%. Discussion: The clinician must be satisfied to perform exploration in search of MB2 canal, making an adequate endodontic access to allow a correct display, to use tools like microscope, ultrasound or TCHC for its detection and morphological study.

Palavras-chave : First permanent maxillary molar; second canal; mesiobuccal root.

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