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. 2017 Jun 19;9(3):217–223. doi: 10.4047/jap.2017.9.3.217

Table 2. Mean values and standard deviation (SD) of physico-mechanical tests.

		PC- control		SPNC
		0%	1.0%	3.0%	5.0%
Setting time (min)	Initial	33.6 (1.8)^a	31.2 (1.4)^a	25.5 (1.2)^b	21.2 (0.5)^c
Setting time (min)	Final	67.2 (2.6)^A	65.6 (1.9)^A	52.3 (1.8)^B	45.5 (1.4)^C
Compressive strength (MPa)	24 h	32.7 (2.5)	31.2 (1.9)	30.3 (2.4)	30.5 (1.2)
Compressive strength (MPa)	168 h	41.7 (2.4)	39.4 (3.3)	40.9 (2.2)	41.2 (1.4)
Solubility (%)	24 h	0.97 (0.02)^a	0.92 (0.05)^a	2.02 (0.03)^b	2.03 (0.01)^b
Solubility (%)	168 h	1.62 (0.04)^A	1.73 (0.06)^A	2.73 (0.12)^B	2.81 (0.07)^B
Silver releases (mg/L)	24 h	0 (0)^a	0.011 (0.002)^a	0.142 (0.008)^b	0.297 (0.02)^c
Silver releases (mg/L)	168 h	0 (0)^A	0.009 (0.003)^A	0.139 (0.011)^B	0.272 (0.019)^C

Different superscript letters in the same row indicate statistically significant difference (P <.05).

Bold font indicates a statistical significance between 24 h and 168 h intervals (P < .05).