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Progress in Orthodontics

Table 1 Properties of the materials considered in this study

From: The effect of space arrangement between anterior teeth on their retraction with clear aligners in first premolar extraction treatment: a finite element study

Model

Young’s modulus (Mpa)

Poisson’s ratio

Cancellous bone

1370

0.3

Cortial bone

13,700

0.3

Teeth

19,613

0.15

Gingival

2.8

0.4

PDL

0.67

0.45

Clear aligner

528

0.36

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