MICROANATOMY

Detailed explanation-1: -Most previous studies on maxillary molars have reported that these teeth usually have three roots and four canals since an extra canal is often found in the mesiobuccal root. Other anatomical variations in the form of an extra C-shaped canal have also been reported in distobuccal and palatal roots.

Detailed explanation-2: -The number of roots for each type of tooth varies. Typically incisors, canines and premolars will have one root whereas molars will have two or three.

Detailed explanation-3: -A maxillary second molar usually has three roots and three canals. The maxillary molar has been reported with various root canal anatomy having four roots [2], two roots [3, 4], and even a single root with a single canal [5]. The prevalence of a single canal in the maxillary molar is reported to be 0.5-0.6% [2, 5].