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Table 2 Poisson’s ratio and Young’s modulus of materials

From: Comparison of the effects of different rapid maxillary expansion techniques on craniofacial structures: a finite element analysis study

Materials

Young’s modulus (MPa)

Poisson’s ratio

Cancellous bone

1370

0.3

Cortical bone

13,700

0.3

Tooth

20,000

0.3

Suture

0.68

0.45

PDL

0.69

0.49

Titanium

114,000

0.34

Rapid maxilla expander

200,000

0.33

Maxilla skeletal expander

193,000

0.3

Acrylic resin

2000

0.3

  1. All materials in the models were assumed to be homogenous, isotropic and linearly elastic