PMID: 30150497Aug 29, 2018Paper

Mesiolingual Canal Prevalence in Maxillary First Molars assessed through Different Methods

The Journal of Contemporary Dental Practice
Alissa L ZurawskiFernando B Barletta

Abstract

Evaluate the prevalence of mesiolingual canal prevalence orifice in mesiobuccal roots of maxillary first molars using five methods of visualization. About 73 first permanent maxillary molars were analyzed. Visual clinical analysis of the presence of the fourth canal was performed using a straight end-odontic exploratory probe (EXDG16®) and a K10 manual file (SybronEndo®). Dental elements that were not located on the fourth canal were analyzed with the aid of a magnifying glass (Zeiss®) with a 2.5-fold increase and those teeth in which the fourth canal was not found went through the examination with clinical surgical microscope (OPTO®) with magnification of 20 times with both the explorer and endodontic file. Next, a periapical radiography of the teeth was performed in the teeth in which the mesiolingual canal was not yet found to observe the presence or absence of the fourth canal. Afterward, the teeth in which the canal was not yet located were scanned using the microtomography equipment (SkyScan®), at 100 kV and 100 μA, with an isotropic resolution of 16 μm. The mesiolingual canal was located in 70 teeth (95.8%) and in only 3 teeth it was not identified. The visual method in the fourth canal search has limitations, whereas th...Continue Reading

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