Fig. 2.
A reference grid was constructed using occlusal plane (OL) and occlusal plane perpendicular (OLp). All sagittal measurements were made from the reference grid to the landmarks A point: upper incisal tip (Is); lower incisal tip (Ii); B point; pogonion (Pg); mesial buccal cusp of upper molar (Ms); and mesial buccal cusp of lower molar (Mi)