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  Indian J Med Microbiol
 

Figure 2: Reference planes and angular measurements. (1) Frankfort plane: line extended from porion to orbitale. (2) Xi-stomion plane: a line extended from Xi point to stomion point. (3) Mandibular plane: a line extended from menton (Me) to gonion (Go). (4) Esthetic Line (E-line): line extended from the tip of the nose (Prn) to the soft-tissue pogonion (pog'). (5) SNA Angle. (6) SNB Angle. (7) Frankfort mandibular plane angle. (8) Frankfort mandibular incisor angle. (9) Incisor-mandibular plane angle

Figure 2: Reference planes and angular measurements. (1) Frankfort plane: line extended from porion to orbitale. (2) Xi-stomion plane: a line extended from Xi point to stomion point. (3) Mandibular plane: a line extended from menton (Me) to gonion (Go). (4) Esthetic Line (E-line): line extended from the tip of the nose (Prn) to the soft-tissue pogonion (pog'). (5) SNA Angle. (6) SNB Angle. (7) Frankfort mandibular plane angle. (8) Frankfort mandibular incisor angle. (9) Incisor-mandibular plane angle