Fig. 1From: Risk assessment of labial bone perforation in the anterior mandibular region: a virtual immediate implant placement studyLandmarks and classification of the crestal and radicular dentoalveolar phenotype (CRDAP) of mandibular anterior teeth in relation to the anterior mandibular osseous housing in sagittal radiographic images. a Landmarks in the sagittal radiographic images. b Radiographic images of four types of CRDAP (upper panel). Schematic illustrations of four types of CRDAP (class I, II, III, and IV) (lower panel), which categorized by the alveolar bone thickness at crestal (green color) and radicular (red color) regionBack to article page