Fig. 2From: A micro–computed tomographic analysis of the root canal systems in the permanent mandibular incisors in a Chinese populationMeasurement of the root canal curvatures in double root canal systems in the mandibular incisors (modified Schneider method). α is angle of primary curvature; β is angle of secondary curvature. A Both the buccal and lingual canal exhibit a single curvature. B The buccal canal exhibits double curvatures. C Both the buccal and lingual canal exhibit double curvaturesBack to article page