Table 1. Mean MTB values and standard deviations of the tested groups and statistical analyses within and between conditions (in vivo and in vitro).

Evaluated Period	Conditions
	In vivo	In vitro
	MTB	Simulated pulpal pressure	Aging	MTB
24 hours	23.21 ± 3.91A, a	No-SPP	Water ageing	24.96 + 3.00A, a
			Cyclic ageing	23.96 ± 1.77A, a
		SPP	Water ageing	17.65 ± 1.42B, b
			Cyclic ageing	19.49 ± 1.60B, b
6 months	14.17 ± 4.78B, a	No-SPP	Water ageing	16.68 ± 4.13B, a
			Cyclic ageing	18.17 ± 2.53B, a
		SPP	Water ageing	14.33 ± 4.69B, a
			Cyclic ageing	17.89 ± 3.98B, a

Different superscript capital letters denote differences within columns (within in vivo or in vitro conditions). Different superscript small letters denote differences within rows (comparison of in vivo with in vitro conditions in each evaluated period).