Fig. 4From: Morphological changes of the root apex in anterior teeth with periapical periodontitis: an in-vivo studyThe distributions of AC-AA, AC-AF and constriction forms in periapical periodontitis and healthy teeth. a, b The distances and distributions of AC-AA and AC-AF in periapical periodontitis and healthy teeth. c The proportions of different constriction forms in teeth with periapical periodontitis and healthy onesBack to article page