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Table 1 Young’s modulus and Poisson’s ratio of various materials used in this study

From: The difference of stress distribution of maxillary expansion using rapid maxillary expander (RME) and maxillary skeletal expander (MSE)—a finite element analysis

No

Material

Young’s modulus

Poisson’s ratio

1

Maxilla skeletal expander (MSE)

193.000 MPa

0.3

2

Rapid maxillary expander (RME)

200.000 GPa

0.33

3

Miniscrew (Ti-6Al-4V: titanium 6% alumunium 4% vanadium)

114.000 MPa

0.34

4

Alveolar bone (cortical bone)

13.700 MPa

0.3

5

Cancellous bone

1.370 MPa

0.3

6

Suture

0.068 MPa

0.49

7

Teeth

20.700 MPa

0.30

8

Enamel

80.000 MPa

0.25

9

Dentine

18.300 MPa

0.30

10

Pulp

0.58 MPa

0.42

11

Periodontal ligament

0.7 MPa

0.49

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