Table 5: Mean and Standard deviation of the different roughness values of samples recorded after abrasion.

	Ra	Rq	Rz	Rt
Group I	4.69 ± 0.18	5.17 ± 0.20	20.47 ± 0.62	31.27 ± 2.0
Group II	4.60 ± 0.16	5.06 ± 0.18	19.38 ± 0.79	33.01 ± 1.0
Group III	4.89 ± 0.06	5.38 ± 0.06	19.66 ± 0.73	32.62 ± 1.44
Group IV	4.63 ± 0.16	5.09 ± 0.17	20.13 ± 0.84	33.70 ± 0.71
Group V	4.62 ± 0.23	5.08 ± 0.25	20.25 ± 0.64	34.53 ± 0.58