Effect of Chemical Challenges on the Properties of Composite Resins

Table 2

Percentage of Vickers microhardness alterations after 180 days of degradation.

Composite resins	Solution treatments
	Water	Alcohol	Citric acid	Phosphoric acid
Z350	−15.22(6.50)^Ba	−48.49(20.16)^Cb	−65.05(28.97)^Bb	−13.20(9.31)^Ba
HRI	8.70(9.81)^ABa	−25.02(14.04)^Cb	−16.12(8.35)^Ab	3.21(1.93)^Aa
BIO	−2.21(1.54)^ABa	−1.81(1.06)^Aa	−12.45(7.59)^Aa	1.52(0.84)^ABa
VITTRA	9.77(9.83)^Aa	−16.86(10.26)^Bb	−8.45(8.24)^Ab	−2.93(1.40)^ABab
BULK	5.15(4.19)^ABa	−5.81(4.18)^Aa	−7.77(6.77)^Aa	−6.64(4.24)^ABa

Different capital letters (in column) and small letters (in line) are statistically different from each other for Tukey’s test .