Locating the MB2 canal in relation to MB1 in Maxillary First Molars using CBCT imaging

Abstract

The aim of this study is to determine the location of MB2 in maxillary first molars in relation to the MB1 using the cone‐beam computed tomography (CBCT) imaging. In this retrospective study, electronic health records’ system was utilised to identify patients who acquired CBCT for the maxillary first molar as an imaging adjunct to their endodontic treatment. Data were evaluated, and statistical analysis was performed. For the initial treatment cases, the distance from MB1 to MB2 was 2.06 ± 0.52 mm. This did not change significantly for cases that were being retreated. Statistically significant differences were observed between the distances from MB1 to MB2 in males vs. female teeth with males demonstrating longer distances as compared to females. Variations in anatomy exist between patients but this study established some guidelines for clinicians to locate the MB2 canal orifices. This could potentially help with treating these teeth with minimal failure rates.

Cone-beam computed tomography study of the incidence and characteristics of the second mesiobuccal canal in maxillary permanent molars

“…Most researchers believe that the MB2 orifice is located mesial to the MB1-P line and on the palate side of MB1. According to Zhuk et al, the MB–MB2 distance is 2.06 ± 0.52 mm, and the distance between root canal orifices is typically greater in male patients than in female patients ( Zhuk et al, 2020 ). This value is greater than that detected for maxillary molars in a Polish population, in which the MB–MB2 distance was 1 mm ( Olczak and Pawlicka, 2017 ).…”

3D geometric analysis of second mesiobuccal canal in permanent maxillary first molar tooth

“…Two endodontists (IK and AC) evaluated the CBCT images. The technique for measuring the anatomic parameters was similar to previously published literature (reference standard) [6,17,21]. To ensure reliability (calibration), the endodontists independently examined 10 CBCT scans.…”

“…Subsequently, a line was drawn connecting the centre of MB and P canal orifices (MB-P). A perpendicular line was drawn from the MB2 orifice to MB-P, and this was considered as the MD (in mm) (Figure 3) [21].…”

“…Presently, cone-beam computed tomography (CBCT) is the preferred clinical imaging modality for studying root canal anatomy [10][11][12]. Although it has limitations of high radiation exposure, scatter and beam hardening of high-density structures [13], it has been effectively used to locate [14][15][16] and study the anatomical parameters of the MB2 canal [17][18][19][20][21][22][23]. The inter-orifice distance (IOD) [17,18,[20][21][22][23], mesial deviation (MD) [20][21][22] and root canal configuration (RCC) of the mesiobuccal root [17,19] have been extensively investigated on CBCT.…”

“…Although it has limitations of high radiation exposure, scatter and beam hardening of high-density structures [13], it has been effectively used to locate [14][15][16] and study the anatomical parameters of the MB2 canal [17][18][19][20][21][22][23]. The inter-orifice distance (IOD) [17,18,[20][21][22][23], mesial deviation (MD) [20][21][22] and root canal configuration (RCC) of the mesiobuccal root [17,19] have been extensively investigated on CBCT. However, the depth of location of the MB2 orifice was not considered in these studies.…”