Table 3.

Changes in microhardness for enamel samples.

Analysis Groups	Mean Change (± SD) in KHN From Initial to Final Value	p
G1 - 35% HP S/F	-54.67 ± 18.98
G2 - 35% HP FN	-61.04 ± 31.56
G3 - 35% HP FFA	-58.14 ± 29.10	.0344a
G4 - 35% HP w/ Ca S/F	-31.18 ± 63.69
G5 - 35% HP w/ Ca FN	12.54 ± 14.74
G6 - 35% HP w/ Ca FFA	-28.33 ± 39.71

^aOne-way ANOVA

SD, standard deviation