Fig. 6
From: Dentomaxillofacial imaging with panoramic views and cone beam CT
a Fine anatomical structures of teeth and their supporting structures in a PTG and b in a part of a PTG image: (a) 1, enamel; 2, dentine; 3, pulp chamber; 4, periodontal ligament space (fine radiolucent line around the root); 5, lamina dura (fine radiopaque line around the root); 6, crestal margin; 7, periapical area; 8, mesial side of the tooth; 9, distal side of the tooth. (b) 1, crestal margin; 2, periodontal ligament space; 3, lamina dura