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

Table 1

Means and standard deviations (SD) for compressive strength values (in MPa) at 24 hours and at 21 days after manipulation of each cement evaluated.

Cement	24 hours (MPa)	SD	21 days (MPa)	SD
PC	37.1^a	4	41.2^a	3.4
MTA	14.3^c	3	43.4^a	6.5
PC + BO	15.4^c	1.6	22.9^c	4.8
PC + ZO	38.5^a	7.4	37.1^a	7.4
PC + CT	26.6^b	4	36.6^a	8.3
PC + SC	38.2^a	3.3	32.6^b	3.9

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).