TABLE 2. Effect of aerobic atmosphere on antimicrobial activity of MTA and calcium hydroxide against E. coli and E. faecalis ^* .

E. coli			E. faecalis
MTAAngelus	MTA Pro-root	Ca(OH)2	MTAAngelus	MTA Pro-root	Ca(OH)2
0	0	9,17 (±0,44)	5,67 (±0,17)	6,33 (±0,17)	6,67 (±0,67)

^*Antimicrobial activity evaluated by agar diffusion method. Values represent the diameter (in mm) of zones of inhibition in mean of three experiments and standard deviation.