Association between second mesiobuccal canal and apical periodontitis in retrospective cone‐beam computed tomographic images

Abstract

This retrospective cone‐beam computed tomography study aimed to investigate the possible associations of apical periodontitis (AP) with missed/unmissed second mesiobuccal (MB2) canals. MB2 canals and AP were investigated in 257 endodontically treated and 673 untreated maxillary molars, and the former were analyzed regarding missed/unmissed MB2 canals. The chi‐squared test and odds ratio (OR) were used for statistics. The prevalence of MB2 canals in maxillary first molars was higher than that in second molars (p = 0.001). MB2 canals were 1.751 times more common in males than in females (OR: 1.751; 95% CI: 1.334–2.297), with a significant difference in the 18–39 age groups (p = 0.005). The risk for AP was 5.5 times greater in endodontically treated maxillary molars with missed MB2 canals than in those with unmissed MB2 canals (p = 0.012) (OR: 5.5, 95% CI: 1.549–19.527). The findings of this study reveal that the likelihood of the MB2 canal is higher in the maxillary first molars of young adult males.

Periapical Lesions and Missed Canals in Endodontically Treated Teeth: A Cone-Beam Computed Tomographic Study of a Chinese Subpopulation

“…The above statement implies that overlooking the presence of the MB2 canal can significantly increase the likelihood of RCT failure. Our study’s findings are consistent with those of a retrospective CBCT study by Colakoglu et al that examined the potential associations between PL and missed MB2 canals [ 39 ]. The study revealed that endodontically treated maxillary molars with missed MB2 canals had a 5.5 times higher risk of PL than those without missed MB2 canals.…”

Endodontic Orthograde Retreatments: Challenges and Solutions

“…According to data in the literature, the missed canals involve mainly the first maxillary molars, especially the mesio-buccal 2 (MB2) canal (Figure 6), followed by the first mandibular molars, especially the second canal in the distal roots. 60,64,65 Moreover, an additional mesial canal, the middle mesial canal, in lower molars is frequently found with a percentage ranging from 0.26% to 53.8%. [66][67][68] Martins et al reported that the overall prevalence of a second canal in the lower central and lateral incisors and canines was 20.4%, 25.3%, and 5.9%, respectively, with the actual percentage strictly related to the population ethnicity as described by Dhuldhoya et al (Figure 7) 69,70 two scenarios that should be taken into consideration are the prevalence of accessory canals in upper and lower premolars and C-shaped canals in lower molars.…”

Можливості Використання Конусно-Променевої Комп’ютерної Томографії Для Ідентифікації Другого Мезіо-Щічного Каналу (Mb2) В Структурі Перших Молярів Верхньої Щелепи

“…При цьому ризик розвитку апікального періодонтиту в області верхніх молярів виявився в 5,5 разів вищий при відсутності адекватного лікування саме другого мезіо-щічного каналу в порівняння із ситуаціями, коли хемо-механічна обробка такого була виконана у відповідності до загальноприйнятих протоколів [12].…”