Morphological aspects of middle mesial canals (MMC) of mandibular first molars were evaluated using micro-CT.
258 mandibular first molars collected from Brazilian and Turkish populations were scanned.
The incidence of MMC in each population was calculated, as well as, several morphological parameters.
The incidence of MMC was significantly higher in the Brazilian (n = 30; 22.1%) than in the Turkish (n = 18; 14.8%) population.