Nasofrontal, nasofacial, nasolabial, mentolabial & cervicomental angleswhat a photo can give, and how we take it.
Chin–lip direction (behind / level / ahead of the nose-tip→chin line), forehead slope and dorsum line from your profile — buckets with an error band rather than degrees to two decimals.
What we report
Chin–lip direction (behind / level / ahead of the nose-tip→chin line), forehead slope and dorsum line from your profile — buckets with an error band rather than degrees to two decimals.
Why not the clinical number itself
These are lateral cephalometric measurements with clinical tolerances of ±1–2 mm / a few degrees. They require a true lateral view in Frankfort horizontal, at a known camera distance, with a scale reference. A phone selfie has none of these: unknown distance (12–19% midface stretch at 8–12 inches per Derakhshan 2024), unknown rotation about the vertical axis (which foreshortens the profile), and no bony landmarks. Frankfort horizontal itself varies ±4.6° between individuals relative to true horizontal (Madsen 2008), and porion — one of its two defining points — is inside the ear canal.
Sources
- Derakhshan et al. 2024, Laryngoscope — doi.org/10.1002/lary.30935
- Madsen, Sampson & Townsend 2008, Eur J Orthod — doi.org/10.1093/ejo/cjn031
- Naini et al. 2017 (mentolabial angle norms: SD ±20.7° in males) — doi.org/10.1186/s40902-017-0102-8
Ratios of near-coplanar frontal distances, angles relative to the interpupillary line, and skin appearance — each with an error bar, each against a population you choose. Start an analysis or read the methodology.
How every bone-level measurement is taken here · all insights