Color Stability and Surface Properties of PMMA/ZrO2 Nanocomposite Denture Base Material after Using Denture Cleanser
Table 2
Mean and SD values of color (ΔE), surface roughness (μm), and Hardness (VHN) of acrylic specimens immersed in different solutions at a given time and concentration.
Nano-ZrO2
Time
Water (W)
Corega (C)
NaOCl (S)
Renew (R)
value
Mean (SE)
Mean (SE)
Mean (SE)
Mean (SE)
Color
0%
T1
1.51 (0.02)
2.98 (0.03)a
3.01 (0.05)a
1.93 (0.04)
0.001
0%
T2
1.99 (0.05)
4.19 (0.06)
5.92 (0.09)
3.83 (0.13)
0.001
2.5%
T1
1.69 (0.02)
2.98 (0.04)
3.05 (0.07)
1.97 (0.02)
0.001
2.5%
T2
2.04 (0.05)
4.96 (0.05)
6.85 (0.12)
2.99 (0.07)
0.001
5%
T1
1.45 (0.01)
2.89 (0.08)
3.01 (0.05)
1.96 (0.05)
0.001
5%
T2
2.19 (0.03)
4.99 (0.08)
6.19 (0.09)
3.19 (0.06)
0.001
Roughness
0%
T1
0.14 (0.01)
0.19 (0.02)a
0.24 (0.02)
0.18 (0.01)a
0.001
0%
T2
0.14 (0.01)
0.23 (0.01)
0.36 (0.01)
0.20 (0.02)
0.001
2.5%
T1
0.17 (0.02)
0.23 (0.02)
0.33 (0.02)
0.21 (0.01)
0.001
2.5%
T2
0.19 (0.02)
0.27 (0.02)a
0.39 (0.02)
0.26 (0.02)a
0.001
5%
T1
0.24 (0.02)
0.27 (0.0)a
0.34 (0.02)
0.26 (0.01)a
0.001
5%
T2
0.25 (0.01)
0.33 (0.02)
0.39 (0.01)
0.29 (0.02)
0.001
Hardness
0%
T1
31.05 (1.3)
27.79 (1.4)a
25.17 (1.1)
28.84 (1.1)a
0.001
0%
T2
30.3 (1.3)
25.68 (1.3)a,b
24.16 (1.4)a
27.29 (1.4)b
0.001
2.5%
T1
38.6 (1.8)a
34.85 (1.2)b
34.29 (1.3)b
39.59 (1.1)a
0.001
2.5%
T2
39.07 (0.97)
33.11 (0.84)
31.54 (1.6)
36.76 (1.1)
0.001
5%
T1
41.46 (1.5)a
40.82 (1.4)a
35.22 (1.2)
38.80 (1.2)
0.001
5%
T2
41.13 (1.3)
37.45 (1.5)a
30.28 (1.3)
36.07 (1.2)a
0.001
indicates a significant difference at α = 0.05. ANOVA and post hoc tests were used for statistical analysis to find statistical significance within each concentration using different solutions; hence, a comparison was done horizontally. Groups with similar letters indicate no significant difference ().
