Planes and angles
Gonial angle
The angle at the gonion between the posterior ramus and the mandibular plane. Adult values commonly fall between 120 and 130 degrees; a smaller angle reads as a more defined, squarer jaw.
What it is
The angle at the gonion between the posterior ramus and the mandibular plane. Adult values commonly fall between 120 and 130 degrees; a smaller angle reads as a more defined, squarer jaw.
How the Codex reads it
READ item A4 reads the angle at rest as soft, defined or already square. That observation routes to width on the ramus or to edge along the border; it is not itself a treatment point.
Questions
What is the gonial angle?
The angle at the gonion between the posterior ramus and the mandibular plane. Adult values commonly fall between 120 and 130 degrees; a smaller angle reads as a more defined, squarer jaw.
How does the Band Codex read the gonial angle?
READ item A4 reads the angle at rest as soft, defined or already square. That observation routes to width on the ramus or to edge along the border; it is not itself a treatment point.
Sources
- Gonial angle, adult cephalometric norms. Journal of the Nepal Medical Association, 2021.Commonly 120 to 130 degrees; 123.7 ± 5.1 degrees in normodivergent men. Values below the range read as a squarer, more defined angle.
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