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Table 1 Properties of the materials considered in this study

From: Torque movement of the upper anterior teeth using a clear aligner in cases of extraction: a finite element 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