Table 3 Relative surface microhardness (% rMDS) according to the groups and substrates evaluated.

CT

35.5 ± 8.2^c

47.2 ± 14.1^b

−

CTF

53.2 ± 14.8^{a, b}

54.7 ± 13.8^{a, b}

−

BB

45.5 ± 8.6^b

60.7 ± 17.5^{a, b}

78.6 ± 11.8 ^{a, b}

BBF

48.1 ± 13.0^b

59.5 ± 13.4^{a, b}

82.4 ± 7.6 ^b

FB

66.0 ± 7.9^a

61.4 ± 10.2^{a, b}

90.1 ± 5.7 ^a

FBF

68.8 ± 18.0^a

69.2 ± 13.0^a

87.9 ± 5.3 ^{a, b}