Color Stability and Surface Properties of PMMA/ZrO2 Nanocomposite Denture Base Material after Using Denture Cleanser
Table 3
Effect of variation in immersion time on acrylic specimen’s color (ΔE), surface roughness (μm), and hardness (VHN) after immersion in different cleansing solutions.
Nano-ZrO2 (%)
Time
Water (W) Mean (SE)
Corega (C) Mean (SE)
NaOCl (S) Mean (SE)
Renew (R) Mean (SE)
Color
0
T1
1.51 (0.02)
0.001
2.99 (0.03)
0.001
3.01 (0.05)
0.001
1.92 (0.04)
0.001
T2
1.99 (0.04)
4.91 (0.06)
5.9 (0.09)
3.83 (0.12)
2.5
T1
1.69 (0.02)
0.001
2.98 (0.04)
0.001
3.05 (0.07)
0.001
1.97 (0.02)
0.001
T2
2.04 (0.05)
4.96 (0.05)
6.85 (0.13)
2.99 (0.07)
5
T1
1.45 (0.01)
0.001
2.89 (0.08)
0.001
3.01 (0.05)
0.001
1.96 (0.05)
0.001
T2
2.2 (0.03)
4.99 (0.08)
6.91 (0.09)
3.20 (0.06)
Roughness
0
T0
0.14 (0.02)
0.562
0.14 (0.02)
0.001
0.14 (0.02)
0.001
0.14 (0.02)
0.001
T1
0.14 (0.01)
0.19 (0.02)
0.24 (0.02)
0.18 (0.02)
T2
0.14 (0.01)
0.23 (0.01)
0.36 (0.01)
0.20 (0.02)
2.5
T0
0.19 (0.01)a
0.012
0.19 (0.01)
0.001
0.19 (0.01)
0.001
0.19 (0.01)
0.001
T1
0.17 (0.02)
0.23 (0.02)
0.33 (0.02)
0.21 (0.01)
T2
0.19 (0.01)a
0.27 (0.02)
0.39 (0.02)
0.26 (0.02)
5
T0
0.26 (0.02)
0.171
0.26 (0.02)a
0.001
0.26 (0.02)
0.001
0.26 (0.02)a
0.001
T1
0.24 (0.02)
0.27 (0.0)a
0.34 (0.02)
0.26 (0.01)a
T2
0.25 (0.01)
0.33 (0.02)
0.39 (0.01)
0.29 (0.02)
Hardness
0
T0
30.63 (1.68)
0.518
30.63 (1.68)
0.001
30.63 (1.68)
0.001
30.63 (1.68)
0.001
T1
31.05 (1.34)
27.79 (1.37)
25.17 (1.06)a
28.84 (1.1)a
T2
30.3 (1.27)
25.68 (1.3)
24.16 (1.36)a
27.29 (1.43)a
2.5
T0
38.77 (1.42)
0.786
38.77 (1.42)
0.001
38.77 (1.42)
0.001
38.77 (1.42)a
0.001
T1
38.64 (1.76)
34.85 (1.23)
34.29 (1.26)
39.59 (1.07)a
T2
39.07 (0.97)
33.11 (0.84)
31.54 (1.58)
36.76 (1.1)
5
T0
41.62 (1.44)
0.722
41.62 (1.44)a
0.001
41.62 (1.44)
0.001
41.62 (1.44)
0.001
T1
41.46 (1.46)
40.82 (1.4)a
35.22 (1.2)
38.8 (1.21)
T2
41.13 (1.27)
37.45 (1.45)
30.27 (1.32)
36.07 (1.2)
Significant difference at α = 0.05. The same letter indicates nonsignificant vertically per concentration ().T0 = 2 days of immersion, T1 = 180 days of immersion, T2 = 365 days of immersion, 0% = pure acrylic resin, 2.5%, acrylic resin reinforced with 2.5% nano-ZrO2, 5% = acrylic resin reinforced with 5% nano-ZrO2.
