Chemical and Mechanical Properties of Experimental Dental Composites as a Function of Formulation and Postcuring Thermal Treatment

Table 2

Means ± standard deviations for degree of conversion (DC), fracture toughness (), flexural strength (FS), and elastic modulus (EM) for BisGMA : TEGDMA molar ratio and thermal treatment factors. For each property, the same letter indicates that there is no statistically significant difference ().

	Molar ratio of BisGMA : TEGDMA		Thermal treatment
	1 : 1	7 : 3	No	Yes
DC (%)	85 ± 5.	80 ± 7.	77 ± 2.	89 ± 2.
	1.46 ± 0.1	1.20 ± 0.1	1.26 ± 0.2	1.40 ± 0.2
FS (MPa)	152 ± 1	140 ± 1	138 ± 1	155 ± 1
EM (GPa)	6.1 ± 2.	5.4 ± 1.	5.3 ± 1.	6.1 ± 1.