Table 1.

Properties of the materials considered in this study

Material	Young’s modulus, MPa	Poisson ratio
Alveolar bone	1.37 × 103	0.3
Tooth	1.96 × 104	0.3
PDL	6.9 × 10−1	0.45
Aligner	816	0.36
Attachment	12.5 × 103	0.36