The prevalence of second canals in the mesiobuccal root of maxillary molars: A cone beam computed tomography study

Abstract

The aim of this study was to determine the prevalence of MB2 canals in permanent maxillary molars utilising CBCT; in patients attending a university hospital. A total of 200 patient scans, (100 female and 100 male patients), were enrolled in the study. In total, 800 teeth were analysed, and teeth with additional canals in their MB roots (MB2) were identified. First maxillary molar teeth exhibited the highest prevalence of MB2 canals, 92% and 87%, for teeth 16 and 26, respectively. Second maxillary molar teeth showed a lower prevalence of MB2 canals, 69% and 65%, for the 17 and 27, respectively. There were no associations of significance between the prevalence of MB2 canals and patient age or gender. Root morphology and anatomy of permanent maxillary first and second molar teeth was found to be highly variable. The prevalence of additional canals in the MB roots is a frequent finding which has previously been underreported.

Prevalence of second canal in the mesiobuccal root of permanent maxillary molars from a Turkish subpopulation: a cone-beam computed tomography study

“…For this reason, it is very important to know and use additional tools to help diagnose MB2 canal detection. The incidence of MB2 canals in 1MMs and 2MMs varies from 8.0% to 96.1% [4,35,47,[55][56][57]. In this study, the prevalence of MB2 was 18.75%, which is lower than some studies [4,7,12,31,38,42].…”

“…The smaller detection rate of MB2 in females can be explained by demineralisation and loss of bone mass, which is three times higher in females than in males [6]. This will prevent accurate tracking of the canal by computed tomography due to lack of contrast [4].…”

“…These differences may result from sample size, methodology and ethnic differences. Alexander et al [4] stated that the reason of differences between results obtained from CBCT may be CBCT parameter settings and software differences. In addition, detection of the MB2 canals is probably difficult due to the dentin cap covering the orifice [15,24].…”

Root and canal configurations of maxillary premolars in a South African subpopulation using cone beam computed tomography and two classification systems

“…However, the root canal system may be complex [2] and/or colonized by a variety of micro-organisms [3]. Thus, a detailed understanding of tooth anatomy is vital to pursuing endodontic treatment because the inability to detect and treat any and all identified canals may result in treatment failure [4].…”

Optimization of the Interdisciplinary Approach to the Secondary Endodontic Treatment of the Upper Jaw Molars with the Mesiobuccal Root Complex Anatomy with Odontogenic Sinusitis

“…Во многих исследованиях сообщается о высокой частоте встречаемости второго мезиобуккального канала (МБ2) в верхних молярах. Так, при изучении 1732 стандартно пролеченных верхних моляров [12] было отмечено, что МБ2 был найден в 73,2% случаев в первых молярах, в 50,7% случаев во вторых молярах и в 20% случаев в третьих молярах. Из них оказалось, что МБ2 был отдельным каналом в 54,9% первых моляров и в 45,6% вторых моляров и сливался с другим каналом (МВ1) во всех третьих молярах.…”