Mechanical Characterization of Thermoplastic Aligner Materials: Recommendations for Test Parameter Standardization

Table 6

Calculated maximal local stresses (MPa) for the different foil thicknesses at different deflections with the 8-mm span length. The calculations were based on the foil thickness reported by the manufacturer. The numbers in italics represent the stresses for the experimentally tested deflection ranges.

Original foil thickness (mm)	Deflection depth (mm)
	0.05 mm	0.1 mm	0.15 mm	0.2 mm	0.25 mm	0.3 mm
	Maximum stress (σmax) (MPa)
0.4	3.84	7.69	11.53	15.38	19.22	23.06
0.5	4.80	9.61	14.41	19.22	24.02	28.83
0.625	6.01	12.01	18.02	24.02	30.03	36.04
0.75	7.21	14.41	21.62	28.83	36.04	43.24