Table 2.

Mean , SD of Hardness and Surface Roughness score in five groups and four FSL solutions

Group	Surface Hardness								Surface Roughness (Ra)
	Distilled water		Ethanol		Citric acid		Air		Distilled water		Ethanol		Citric acid		Air
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
A- SDR	28.35	1.1	29.67	1.37	29.1	1.36	25.89	1.37	0.0584	0.0064	0.0778	0.0071	0.0641	0.007	0.0452	0.0036
B- CFM	96.76	3.75	107.4	3.75	101.84	3.03	104.29	3.45	0.0359	0.0045	0.0306	0.0039	0.0375	0.0049	0.0373	0.0025
C -EX	58.83	4.93	58.39	2.82	56.68	4.08	61.17	3.64	0.0492	0.0049	0.0454	0.004	0.0455	0.0036	0.0357	0.0025
D-TEC	53.71	7.23	37.49	1.48	41.43	1.25	44.04	1.25	0.0402	0.0025	0.0547	0.0045	0.0511	0.0072	0.0378	0.0052
Z -350	71.46	0.66	74.18	2.7	74.18	2.7	72.92	1.41	0.0385	0.0078	0.0377	0.004	0.0463	0.0039	0.0314	0.0042