Table 7: Mean and Standard deviation of the different roughness values of samples after polishing.

	Ra	Rq	Rz	Rt
Group I	0.30 ± 0.03	0.32 ± 0.04	1.39 ± 0.06	4.19 ± 0.17
Group II	0.67 ± 0.07	0.73 ± 0.07	3.05 ± 0.11	4.45 ± 0.21
Group III	0.79 ± 0.04	0.86 ± 0.04	4.39 ± 0.15	5.29 ± 0.16
Group IV	0.68 ± 0.11	0.75 ± 0.12	3.37 ± 0.16	4.76 ± 0.25
Group V	0.37 ± 0.06	0.40 ± 0.07	1.55 ± 0.08	4.61 ± 0.22