Ramus : mandibular body ratiowhat a photo can give, and how we take it.
Jaw taper and jaw:cheek width. The vertical ramus is hidden in any photo, so the ratio is not attempted; the two silhouette reads carry what it would tell you.
What we report
Jaw taper and jaw:cheek width. The vertical ramus is hidden in any photo, so the ratio is not attempted; the two silhouette reads carry what it would tell you.
Why not the clinical number itself
The ratio requires condylion (the top of the mandibular condyle, inside the temporomandibular joint) — a point that is not externally visible at all — and gonion (see above). Neither exists in a photograph. Cephalometric ideals (~0.68–0.75, Jarabak-type ratios) apply to radiographs.
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