The reference lateral cephalometric radiographic tracing points used in the study. A point: The innermost point on the curvature of the surface of the maxillary bone. B point: The innermost point on the contour of the mandible. Go: gonion: the intersection of the line tangent to the posterior and inferior angle of the mandible. Me: menton, the most inferior point on the mandibular symphysis. N: nasion, the most anterior point of the intersection between the nasal and frontal bones (frontonasal suture). S: sella, the midpoint of the sella turcica. Po: porion, the most superior point of the contour of the external auditory meatus. Or: orbitale, the most inferior point on the margin of the orbit.