Table 3.

The Young's modulus and the Poisson's ratio of the materials

Materials	Young's modulus (MPa)	Poisson's ratio
Enamel	84100	0.20
Dentin	18600	0.31
Pulp	2	0.45
Composite resin	6700	0.22
Periodontal ligament	70	0.45
Spongy bone	1500	0.30
Cortical bone	15000	0.30