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Table 1 Measurement Variables of Teeth Used

From: Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients

Measurement Variables Definition
CE (T1—T2) (a) anterior teeth retraction amount at crown edge in the vertical direction
RA (T1—T2) (b) anterior teeth retraction amount at root apex in the horizontal direction
La (T1—T2) Loss of root on labial surface
P (T1—T2) Loss of root on palatal surface
M (T1—T2) Loss of root on mesial surface
D (T1—T2) Loss of root on distal surface
RA (T1—T2) Loss of root at root apex