Standardized head position and reference planes for dento-facial aesthetics.

: The angulations of the anterior teeth in the sagittal view are important for diagnosing lip support for pleasing smiles and proper facial profiles (Figure 19). In Figure 20, the slant of the occlusal plane (incisal-canine line), the off-center tilted midline, and the asymmetry of the gingival line (contours) of this patient in the frontal view are now obvious. A diagnosis can now be made for possible correction using the horizontal and vertical frames of the articulator as a bioesthetic guide.