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Point
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Nasion
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Na
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The middle point of the junction of the frontal and the two nasal bones
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Porion
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Po
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The highest point of the skeletal external auditory meatus (PoR, right side; PoL, left side; PoC, center of the PoR and PoL, automatically determined)
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Orbitale
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Or
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The lowest point in the lower margin of the bony orbit (OrR, right side; OrL, left side; OrC, center of the OrR and OrL, automatically determined)
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Pogonion
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Pog
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The most anterior point of the mandible in the midline
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Mental foramen
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MF
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The center of mental foramen (MFR, right side; MFL, left side)
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Gonion
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Go
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The most inferior, posterior, and lateral point of the angle of the mandible (GoR, right side; GoL, left side)
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Sigmoid notch
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SN
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The deepest point between the condylar and coronoid process of the mandible (SNR, right side; SNL, left side)
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Line
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FH line
| |
A line projecting the PoC and OrC
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Plane
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McNamara plane
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pMcN
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A plane through the nasion and perpendicular to the FH line
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Occlusal plane
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pOcc
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A plane through the bilateral mandibular first molar mesiobuccal cusp and the middle of the lower incisal edge
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MF_H plane
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pMF_H
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A plane through the MF point and parallel to the pOcc
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MF_V plane
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pMF_V
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A plane through the bilateral MF and perpendicular to the pOcc
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