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Two hundred permanent human canines (100 maxillary canines and 100 mandibular canines) were studied radiologically (50 maxillary canines: Group A-1 and 50 mandibular canines: Group A-2) and by decalcification and clearing method (50 maxillary canines: Group B-1 and 50 mandibular canines: Group B-2) as regards teh configuration and deviations of the root canals. Inradiological method the teeth were radiographed from two directions viz. mesiodistal and buccolingual. Group A-1: Type I canal configuration was observed in 98% and Type II in 2%. Root canals were straight in 46% and curved in 54% cases. Apical foramen was centrally located in 38% and laterally located in 62% cases. Accessory canals and apical deltas was observed in 18% each respectively. Group A-2: Type I canal configuration was observed in 18% and Type II, III and IV in 4% each. Root canals were straight in 53.84% and curved in 46.15% cases. Apical foramen was centrally located in 34.61% and laterally located in 65.38%. Accessory canals and apical deltas were observed in 15.28% each respectively. Group B-1: Type I canal configuration was observed in 98% and Type II in 2%. Root canals were straight in 44% and curved in 56% cases. Apical foramen was centrally located in 50% and laterally located in 50% cases. Accessory canals and apical deltas was observed in 10% each respectively. Group B-2: Type I canal configuration was observed in 70%, Type II in 12%. Type III in 6%, Type IV in 10% each and Type V in 2%. Root canals were straight in 60.71% and curved in 39.28% cases. Apical foramen was centrally located in 57.14% and laterally located in 42.85%. Accessory canals and apical deltas were observed in 16.07% each respectively. Since there can be wide variations in root canal configuration of permanent human canines. So more time should be devoted to study the radiographs so as to anticipate the canal configuration and deviations.
