Effect of Polymerization Time and Home Bleaching Agent on the Microhardness and Surface Roughness of Bulk-Fill Composites: A Scanning Electron Microscopy Study

Table 6

Percentage alteration of roughness values of composites (between before and after bleaching measurements) and values.

Polymerization time	FB; % alteration	SF; % alteration
10 s			0.684
20 s			0.796
30 s			0.011
	0.310	0.016

Different capital letters show the significant differences between the columns (). Different small letters show the significant differences between the lines in each group ().