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

Table 3

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

Materials	Z250	Z350XT	Z550
WT0	100.93 ± 12.22^Aa	94.20 ± 4.63^Aa	108.17 ± 13.89^Aa
DT0	109.09 ± 10.74^Aa	111.96 ± 10.57^Aa	115.17 ± 16.04^Aa
WT24	124.79 ± 19.52^Bb	98.38 ± 22.30^Ab	111.72 ± 18.69^Ab
DT24	135.19 ± 18.68^Bb	106.17 ± 24.96^Aa	114.72 ± 22.97^Ab

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.