Table 1 Material properties.

From: Three-dimensional finite element analysis of the optimal mechanical design for maximum inward movement of the anterior teeth with clear aligners

Materials

Modulus of elasticity (MPa)

Poisson’s ratio

Periodontal ligament

0.69

0.045

Dentition

19,600

0.30

Alveolar bone

1370

0.30

clear aligners

528

0.36

Attachments

12,500

0.36

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