Table 7 Mean and SD of fracture resistance test relative to restorative material, access cavity and aging. Significant values are in bold. The same upper case letters indicate no statistically significant differences in rows (p > 0.05). The same lower case letters indicate no statistically significant differences in columns within each group (p  >0.05).

Filtek only

TEC

929 ± 216^{A, a}

1089 ± 236^{A, a}

974.21 to

1258.07

0.132

-372.86 to 53.06

TREC

1289 ± 556^{A, a}

1446 ± 305^{A, a}

1190.11 to 1686.29

0.442

-578.73 to 263.53

everX + Filtek

TEC

1428 ± 226^{A, a}

1459 ± 239^{A, a}

1266.51 to 1629.77

0.774

-249.04 to 188.44

TREC

1430 ± 456^{A, a}

1587 ± 415^{A, a}

1105.79 to 1883.81

0.429

-565.35 to 250.75

Fuji + Filtek

TEC

970 ± 173^{A, a}

1462 ± 356^{B, a}

975.11 to 1718.63

0.001

-757.06 to -229.94

TREC

1704 ± 473^{A, b}

1801 ± 453^{A, a}

1365.88 to 2041.92

0.671

-569.36 to 374.96