Research Article
Effects of Variable Composite Attachment Shapes in Controlling Upper Molar Distalization with Aligners: A Nonlinear Finite Element Study
Table 1
Mechanical properties of the involved structures.
| | Young’s modulus (MPa) | Poisson’s ratio | References |
| Cortical bone | 13.7 × 103 | 0.30 | Barone et al. [23] | Spongious bone | 1.37 × 103 | 0.30 | Barone et al. [23] | Composite attachment | 12.5 × 103 | 0.36 | Gomez et al. [14] | Plastic aligner | 528 | 0.36 | Gomez et al. [14] | Enamel | 4.1 × 104 | 0.30 | Gomez et al. [14] | PDL (nonlinear elastic) | | 0.45 | Qian et al. [20] |
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PDL, periodontal ligament. Nonlinear mechanical properties for PDL were based on experimental data. |