SNA, Sella-nasion-A point; SNB, sella-nasion-B point; ANB, A point-nasion-B point; FMA, Frankfurt-mandibular angle; NPo, nasion-pogonion; FH, Frankfurt plane; FMIA, Frankfurt-mandibular incisor angle; Is-Is', distance from the incisal edge of the upper central incisor to the palatal plane; Mo-Ms, distance from the buccal cusp tip of the upper first molar to the palatal plane.