Effects of simulated intraoral temperatures and wet environments on the stress relaxation properties of thermoplastic aligner materials

Table 2 1/4 tensile strength and corresponding tensile strain in room temperature

abbreviation	type	tensile modulus	ultimate tensile strength	1/4 ultimate tensile strength	deflection at 1/4 ultimate tensile strength	strain at 1/4 ultimate tensile strength
		(GPa)	(MPa)	(MPa)	(mm)	(%)
B	Biolon	2.05 ± 0.07	51.73 ± 1.80	12.93	0.29	0.87
D	Duran	2.01 ± 0.05	52.80 ± 1.14	13.2	0.31	0.94
E	Erkodur	2.07 ± 0.06	59.76 ± 0.51	14.94	0.33	1
ACE	Essix ACE	1.82 ± 0.06	47.06 ± 0.13	11.77	0.3	0.92
C +	Essix C +	1.06 ± 0.05	33.82 ± 2.43	8.46	0.25	0.76

The values are represented as the mean ± standard deviation, for their normal distribution
Tensile modulus (GPa): refers to the ratio of stress to strain within the elastic limit of a material
Ultimate tensile strength (MPa): refers to the maximum tensile force that a material can withstand per unit area when subjected to tensile force
1 GPa = 1000 MPa

ISSN: 1746-160X