| 1. Biomechanical Characters of Human Mandible Under Tension Load Objective: To study the biomechanical properties of human mandible under Tension Load and deduce the constitutive equation. Methods: 100 specimens taken from five mandible of fresh human cadavers were examined on INSTRON by a group of tensile tests at different strain rates (0.0003 0.003.. 0.03 0.3s?. Bone mineral density of every individual mandible was measured. The effect of strain rate(~), bone mineral density (p) on Young扢odulus (E), strength (cr ~) and ultimate strain ( ~ ~) was studied and the constitutive equation was deduced using the following model: Y=a p ~ Results: (1)u ~=126.36 p ~ E 0.044 ( P<0 .01) (2)E=25170.97p0? ~0.052 (~ |
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