From: Forces and moments generated during extrusion of a maxillary central incisor with clear aligners: an in vitro study
Component
Definition
Sign
UL1
UR1
Fx
Faciolingual
+
-
L
F
Fy
Mesiodistal
D
M
Fz
Occlusogingival
O
G
Mx
Angulation
My
Inclination
Mz
Rotation