Chemical Changes Associated with Increased Acid Resistance of Er:YAG Laser Irradiated Enamel

Table 2

The mean values and standard deviations of released calcium into acid solution per group.

Group	𝑁	Calcium (mg/L) ± SD
I	12	0.92^A±0.47
II	12	0.27^B±0.15
III	12	0.14^C±0.03
IV	12	0.17^C±0.08

Groups with different letters are significantly different (𝑃≤0.05).