Fig. 1

Landmarks and reference planes. a Reference plane: 1, horizontal plane (Frankfort horizontal plane); 2, coronal plane; 3, sagittal plane. b Soft tissue landmark on frontal view. c Soft tissue landmark on lateral view
Landmarks and reference planes. a Reference plane: 1, horizontal plane (Frankfort horizontal plane); 2, coronal plane; 3, sagittal plane. b Soft tissue landmark on frontal view. c Soft tissue landmark on lateral view