Measurement · SNOCC
SN to occlusal plane
Loading the reference ceph.
Definition
The inclination of the occlusal plane to the anterior cranial base (S–N).
How
Draw S–N and the occlusal plane (incisal overlap point → OP); measure the angle (norm ≈ 14°).
Purpose
Steiner's occlusal-cant read: how the functional plane is rotated within the face. It shifts with vertical growth and with mechanics (molar intrusion/extrusion), so it doubles as a treatment-effect monitor.
High
Above the norm reads as a steep occlusal plane relative to the cranial base (vertical pattern / Class II mechanics signature).
Low
Below the norm reads as a flat occlusal plane (horizontal pattern).
Built from
Listed by Steiner.
This is a reviewed tracing on one real cephalogram — the same ceph on every page in Learn — so SN to occlusal plane here is a real reading and not a diagram.