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. 2015 Jun 19;24(5):451–457. doi: 10.1159/000433435

Table 3.

The values of the enamel surface roughness parameters in relation to the type of soft drink

Exposure, min	Roughness parameters	Coca-Cola	Orange juice	Cedevita	Guarana	Strawberry yoghurt
15	R^a	1.49 ± 0.08	1.27 ± 0.01^a	1.09 ± 0.03^a ^b	1.07 ± 0.02^a ^b	0.67 ± 0.02^a,^b,^c,^d
	R_q	2.60 ± 0.08	1.67 ± 0.07^a	1.38 ± 0.06^a,^b	1.22 ± 0.14^a,^b,^c	0.80 ± 0.03^a,^b,^c,^d
	R_z	10.55 ± 1.57	6.16 ± 0.43^a	4.49 ± 0.40^a,^b	4.46 ± 0.46^a,^b	1.67 ± 0.07^a,^b,^c,^d

	R_y	19.11 ± 0.95	10.67 ± 0.82^a	6.92 ± 0.58^a ^b	6.39 ± 0.93^a ^b	4.69 ± 0.46^a,^b,^c,^d
30	R^a	1.63 ± 0.05	1.63 ± 0.02	1.14 ± 0.03^a ^b	1.11 ± 0.02^a ^b	0.67 ± 0.02^a,^b,^c,^d
	R_q	2.11 ± 0.02	2.10 ± 0.03	1.43 ± 0.07^a ^b	1.42 ± 0.06^a,^b	0.79 ± 0.05^a,^d
	R_z	5.62 ± 0.01	5.37 ± 0.15^a	4.69 ± 0.46^a ^b	4.59 ± 0.51^a ^b	1.68 ± 0.08^a,^d
	R_y	9.27 ± 0.22	9.09 ± 0.22	6.48 ± 0.66^a ^b	6.12 ± 0.58^a ^b	4.73 ± 0.43^a ^d

60	R^a	1.82 ± 0.01	1.78 ± 0.07	1.20 ± 0.04^a,^b	1,20 ± 0.04^a ^b	0.68 ± 0.05^a,^d
	R_q	2.57 ± 0.02	2.49 ± 0.18	1.48 ± 0.07^a ^b	1.43 ± 0.11^a ^b	0.85 ± 0.08^a,^d
	R_z	7.80 ± 0.29	7.68 ± 0.30	4.73 ± 0.43^a ^b	4.88 ± 0.26^a,^b	1.74 ± 0.13^a,^d
	R_y	13.96 ± 0.57	12.86 ± 1.66	7.05 ± 1.28^a ^b	6.22 ± 0.63^a ^b	4.81 ± 1.00^a,^b,^c,^d

^a

p < 0.05 vs. Coca-Cola;

^b

p < 0.05 vs. orange juice;

^c

p < 0.05 vs. Cedevita;

^d

p < 0.05 vs. Guarana.