Morphology of Accessory Canals in Mandibular First Molar of a Malaysian Subpopulation Using a Novel Coding System: A Micro-Computed Tomographic Study

Objective: This study investigated the morphology of accessory canals in the mandibular first molar of a Malaysian subpopulation.
Method: A total of 140 mandibular first molars were scanned using micro-computed tomography. The accessory canals for each of the mesial and distal roots were classified according to Ahmed et al. system based on location (coronal, middle and apical thirds) and type (patent, blind, loop and delta). A total of thirty mandibular first molar teeth were used for calibration. The Chi-square test was used to assess the association between the categorical variables. The significance was set at 0.05 (p<0.05).
Results: Results showed that the prevalence of accessory canal is 80.71%. The apical third had the most accessory canal in the mesial (79.3%) and distal (75.9%) roots, with the patent type was the most common (76.43% and 71.43%, respectively) with the code of M(A1), D(A1). No significant association was found between root type and the presence of the accessory canals (p=0.071). A significant association was found between the type of accessory canals and the location within the root (p<0.001).
Conclusion: In this population, the mandibular first molars in Malaysian population showed a high prevalence of accessory canals in the mesial and distal roots. Patent accessory canals in the apical third are the most common in both roots followed by apical delta. (EEJ-2024-10-163)