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

Table 4

Mean ± SD, minimum, median, and maximum values of surface hardness of the samples.

Materials	Groups	Mean ± SD	Minimum	Median	Maximum
Z250	WT0	86.86 ± 4.15	81.33	87.67	92.67
	DT0	82.73 ± 2.50	79.33	82.00	85.67
	WT24	91.26 ± 2.20	78.67	91.00	93.67
	DT24	80.60 ± 1.65	78.67	81.33	82.33
Z350 XT	WT0	73.79 ± 5.65	67.00	73.00	82.33
	DT0	68.40 ± 7.46	56.00	70.00	76.00
	WT24	91.33 ± 7.77	82.00	89.00	102.00
	DT24	94.13 ± 3.56	89.67	93.67	99.33
Z550	WT0	82.46 ± 2.61	78.33	82.67	85.00
	DT0	77.53 ± 2.31	74.67	78.33	80.33
	WT24	95.66 ± 2.86	92.33	95.67	99.67
	DT24	84.93 ± 1.84	82.67	85.00	87.67

W₀: wet polishing at time 0; D₀: dry polishing at time 0; W₂₄: wet polishing after 24 hours; D₂₄: dry polishing after 24 hours.