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

Table 1

Mechanical properties assigned to each body.

	Young’s modulus (MPa)	Poisson’s ratio
Tooth	20000	0.3
Bone	13800	0.3
Aligner	2050	0.3
Attachment	20000	0.3
PDL	0.059	0.49