. 2022 Feb 10;2022:7946239. doi: 10.1155/2022/7946239

Table 2.

Comparison of mean ± SD values of fracture toughness (K_Ic) between all materials after wet or dry storage, analysed by independent t-test.

Storage time	1 day			7 days			60 days
Condition	Dry	Wet	P value^∗	Dry	Wet	P value^∗	Dry	Wet	P value^∗
Aura (bulk-fill)	16.80 ± 1.10^A	17.74 ± 1.43A	0.235	17.76 ± 1.82^A	15.16 ± 0.78^A	0.009	16.82 ± 1.80^A	13.55 ± 1.17^A	0.001^∗
Tetric Evoceram (bulk-fill)	15.87 ± 2.15^A	17.10 ± 1.86A	0.959	14.39 ± 1.07^A	14.88 ± 2.44^A	0.686	18.31 ± 2.56^A	15.32 ± 2.97^A	0.107
G-ænial Universal Flo	22.97 ± 3.11^B	19.25 ± 2.93A	0.074	23.4 ± 6.11^B	22.09 ± 1.49^B	0.630	27.94 ± 5.39^B	26.58 ± 5.37^B	0.671
GC Kalore	16.85 ± 0.86^A	16.8 ± 2.01A	0.314	14.26 ± 1.77^A	14.89 ± 3.14^A	0.688	18.38 ± 2.64^A	15.87 ± 3.49^A	0.190
P value	<0.001	0.257		0.001	<0.001		<0.001	<0.001

^∗Significance level of independent t-test between wet and dry storage (P value< 0.05). Different uppercase letters show significant difference between materials in each condition (column).