Table 1.

Physical properties of the materials.

Material	Modulus of elasticity (MPa)	Poisson's ratio
Tooth solid	18,600	0.31
Ni–Cr alloy	204,000	0.30
Titanium (fixture, abutment, fixation screw)	117,000	0.35
Cement (glass ionomer)	16,900	0.30
Cortical bone	13,700	0.30
Spongy bone	1370	0.30
Periodontal ligament	170	0.45