Table 2.
Material Properties
| Component |
Young's Modulus (MPa) |
Poisson's Ratio |
| Teeth | 1.96*104 | .30 |
| Periodontal ligament | 0.67 | .45 |
| Bone | 1.37*104 | .30 |
| Attachment | 12.5*103 | .36 |
| Clear aligner | 528 | .36 |
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