Frequency of third mesial canal and isthmus of first and second mandibular molar teeth in 2016 in clienteles of faculty of dentistry of Tabriz university of medical science

Abstract

Background: Success in identifying, locating, clearing and disinfecting mesial canals are important factors in preventing apical periodontitis and root canal treatment failure. Due to the influence of factors such as sex on root canal diversity, we aimed to study the frequency of third mesial canal and isthmus in first and second mandibular molar teeth during 2016 in in clienteles of Faculty of Dentistry of Tabriz University of Medical Science.

Methods & Materials: This retrospective cross-sectional study was performed over a number of 215 CBCT radiographs of patients referred to Radiology ward of Faculty of Dentistry of Tabriz University of Medical Science , which has untreated first and second mandibular molar teeth in axial view in 2016. The Spearman test and was used to investigate the relationship between age and sex with the presence of the third mesial canal in the studied patients. The results of the study were reported using frequency (percentage) To compare the frequency of middle mesial canals and ismus between men and women As well as in the first and second molas Chi-square test was used. Statistical analysis was performed using SPSS 16 software And the significance level was considered p <0.05. Results: In this study, the prevalence of third mesial canal in first and second mandibular molar teeth was 9%; as out of 454 patients, only 41 ones had mesial third canals. From the total number of patients with third mesial canal, 32 (78%) were referred for first molar root and 9 (22%) for second molar root. Although patients with the third mesial canal in first molar were younger than patients with the third mesial canal in second molar, there was no significant relationship between age and the presence of the third mesial canal. In addition, females were more likely than males to have the third mesial canal, but there wasn’t any significant relationship between gender and the presence of the third mesial canal. Conclusion: The results of our study showed a relatively low prevalence of ismus and medial canal in the first and second mandibular molars in this population referred to Tabriz University of Medical Sciences, which was not affected by factors such as left and right and gender.