Effect of Wet and Dry Finishing and Polishing Technique on Microhardness and Flexural Strength of Nanocomposite Resins

Table 5

Mean ± standard deviation (SD) values and result of comparison of hardness in three different composites in different polishing statuses (dry and wet) and times (0 and after 24 hours).

Materials	Z250	Z350XT	Z550
WT0	86.86 ± 4.15^Aa	73.79 ± 5.65^Ab	82.46 ± 2.61^Aa
DT0	82.73 ± 2.50^Ba	68.40 ± 7.46^Ab	77.53 ± 2.31^Ba
WT24	91.26 ± 2.20^Aa	91.33 ± 7.77^Ba	95.66 ± 2.86^Ca
DT24	80.60 ± 1.65^Ba	94.13 ± 3.56^Bb	84.93 ± 1.84^Aa

W₀: wet polishing at time 0; D₀: dry polishing at time 0; W₂₄: wet polishing after 24 hours; D₂₄: dry polishing after 24 hours. Means followed by different lowercase letters show statistically significant differences between them, as compared in rows. Means followed by the same uppercase letters do not show statistically significant differences between them, as compared in columns.