Placed short of the apex
The lower root is more often obscured than the upper one, and stopping early shortens the axis and flattens IMPA.
Point · L1A
Lower incisor apex
The root apex of the same lower central incisor.
At Beginner a placement counts as found within 3.5 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 apex and a typical miss, on the same ceph, at the distance the mistake usually goes.
Placed on the cortical plate beside the root
A cortical plate runs parallel to the root and reads brighter than the root does. Here it is the lingual plate, a couple of millimeters behind the apex; on a proclined lower incisor it is the labial one in front.
Used in
9 measurements are built on it. Miss it, and every one of them moves.
Your record
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