Placed on the upper incisor edge
In a deep bite the two edges are within a millimeter of each other on the ceph and the crowns overlap.
Point · L1T
Lower incisor tip
The incisal edge of the most prominent lower central incisor.
At Beginner a placement counts as found within 2.1 mm of the reviewed reading.
How to find it
Press a step to be shown it on the ceph.
Common errors
Each figure is the reviewed reading of Lower incisor tip and a typical miss, on the same ceph, at the distance the mistake usually goes.
Placed on the wrong lower central
Same trap as above: pick the more anterior one every time so the axis is comparable between cephs.
Used in
13 measurements are built on it. Miss it, and every one of them moves.
- IMPA — lower incisor to mandibular plane
- IMPA — lower incisor to mandibular plane (Tweed)
- FMIA — Frankfort-mandibular incisor angle
- L1 to N–B (angle)
- L1 to N–B (mm)
- Interincisal angle
- U1 to occlusal plane
- Cant of the occlusal plane
- L1 to occlusal plane
- SN to occlusal plane
- Wits appraisal (AO–BO)
- L1 to A-Pog (mm)
- L1 to A-Pog (angle)
Your record
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