Figure 1.

Clinical and radiographic photographs associated with the first and second case modules. In the first case, subgingival dental caries was observed on the mesiobuccal aspect of the first molar, and a deep periodontal pocket (10–12 mm) was detected on the mesial side of the second molar by clinical probing. Radiographic imaging revealed a radiolucent caries lesion extending to the mesial root canal of the first molar (red dotted line) and an extensive bony lesion including to the furcal (arrow) and apical areas of the second molar (white dotted line). In the second case, extensive bony destruction on the mesial side of the first molar was found clinically and radiographically (white dotted line) with involvement of the mesial furcation (arrows).