Table 2: Comparison of the mechanical properties among the four groups

		Compressive strength				Diametrical tensile strength
Groups		Mean ± SD* (MPa)†		p-value		Mean ± SD* (MPa)†		p-value
A		17.10 ± 9.07		0.95 NS		6.5 ± 1.32		0.52 NS
B		16.82 ± 4.63				5.51 ± 1.57
C		123.54 ± 47.68		0.60 NS		43.37 ± 13.77		0.58 NS
D		107.93 ± 42.06				32.69 ± 21.76

*SD: Standard deviation; †MPa: Megapascal; NS: Nonsignificant