Table 2.

Mean of percentage of dye penetration and standard deviation in each group.

Groups	Mean	Std. deviation
Ca	86.52%	20.10
L−b	49.39%	43.29
L+c	16.22%	23.47

^aControl group.

^bLaser only group.

^cLaser plus nanoparticle hydroxyapatite paste group.