Microhardness, Structure, and Morphology of Primary Enamel after Phosphoric Acid, Self-Etching Adhesive, and Er:YAG Laser Etching

Table 2

Atomic percentages (at%) of C, O, P, and and the ratio in conditioned human primary enamel.

Group	C	O	P	Ca	Ca/P
I	A	A	A	A	A
II				A	A, B
III	A	A	A	A	A, C
IV	A	A	A	A	A, C
V	A	A	A	A

Groups with different letters are significantly different () from each other.