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Abstract
C-shaped canals are mostly found in mandibular second molars. Studies have shown that
frequency ranges from 2.7 to 31%. This study was undertaken to provide further knowledge
of the distribution of such canal anatomy, by determining the frequency of C-shaped
canals in a sample representing the Lebanese population. Ninety-four mandibular second
molars with scheduled endodontic treatment were examined over a 1-yr period. Of the
94 treated molars, 18 exhibited C-shaped canals that would represent 19.1% of the
sample. The geographical position of Lebanon could represent an explanation for this
phenomenon.