Characterisation of Root Canal Configurations and Accessory Canals in Mandibular Incisors: A Micro-Computed Tomography Study on a Malaysian Subpopulation.

This micro-CT study evaluated the root canals of 135 mandibular incisors in a Malaysian subpopulation using Vertucci (1984) and Ahmed et al. (2017), whilst the accessory canals were classified using the Ahmed et al. (2018) system. The Chi-square and Fisher Exact tests were used for analysis (p = 0.05). Results showed that 53% of the teeth had Type I/1MI1 canals, whilst Type III/1MI1-2-1 canals occurred significantly less often in 15% of teeth (p < 0.001). Non-classifiable Vertucci canals occurred in 21% of teeth, all of which were classified using the Ahmed et al. system. Accessory canals were identified in 24% of the samples, with a single patent accessory canal being the most common compared to other groups (p < 0.05). Accessory canals were significantly more common in code 1ManI1-2 (p < 0.05). In conclusion, the use of Ahmed et al. complementary codes to categorise accessory canals supplemented the characterisation of the main canals and provided more comprehensive and complete information on their internal anatomy.