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

Table 1

Comparison of Vickers microhardness among groups.

Group	Vickers microhardness number ()	SD	Post hoc test
I	198.56	1.92	A
II		0.84
III	72.34	1.78	C
IV	177.76	6.5	A
V	59.93	4.36	C

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