Biomechanical Effects of Different Auxiliary-Aligner Designs for the Extrusion of an Upper Central Incisor: A Finite Element Analysis

Table 3

Translation and rotation movements of the target tooth in the four different configurations.

	Expected movement	Standard aligner	Rectangular palatal attachment	Rectangular buccal attachment	Ellipsoid buccal attachment
Rotation x (°)	0	0.1	−0.09	0.15	0.15
Rotation y (°)	0	−0.13	−0.17	−0.11	−0.18
Rotation z (°)	0	−0.55	−0.41	−0.01	−0.11
Translation x (mm)	0	0	0	0	0
Translation y (mm)	0	0	0.01	0.01	0.01
Translation z (mm)	0.15	0.02	0.07	0.06	0.06