Compressive Strength and Setting Time of MTA and Portland Cement Associated with Different Radiopacifying Agents

Table 2

Means and standard deviations (SD) for the initial and final setting times (in minutes) for each cement evaluated.

Cement	Initial (min)	SD	Final (min)	SD
PC	25.5^a	1.6	84.1^a	8.6
MTA	13.5^b	1.2	48.3^c	4.0
PC + BO	13.7^b	0.8	66.7^b	3.5
PC + ZO	15.5^b	1.2	73.0^b	4.0
PC + CT	14.6^b	0.6	80.5^a	5.7
PC + SC	12.2^b	1.4	73.1^b	7.3

PC: Portland cement; MTA: white MTA-Angelus; BO: bismuth oxide; ZO: zirconium oxide; CT: calcium tungstate; SC: strontium carbonate.
Different superscript letters (a, b, and c) indicate a statistically significant difference (𝑃<0.05).