. 2016 May 27;17(6):822. doi: 10.3390/ijms17060822

Table 1.

Comparison of mean surface roughness (S_a) among different experimental groups.

Materials	Mean Surface Roughness (Mean ± SD)					p-Value
Materials	Control Group	20 s	40 s	80 s	160 s	p-Value
Celtra	0.08 ± 0.008 ^a	0.14 ± 0.006 ^b	0.22 ± 0.02 ^c	0.28 ± 0.03 ^d	0.33 ± 0.020 ^e	0.001 *
e-max	0.16 ± 0.030 ^a	0.21 ± 0.030 ^b	0.30 ± 0.02 ^c	0.56 ± 0.05 ^d	0.65 ± 0.016 ^e	0.001 *
Mark II	0.14 ± 0.016 ^a	0.36 ± 0.020 ^b	0.41 ± 0.01 ^c	0.59 ± 0.01 ^d	0.60 ± 0.010 ^d	0.001 *
Suprinity	0.09 ± 0.010 ^a	0.46 ± 0.020 ^b	0.55 ± 0.06 ^c	0.56 ± 0.03 ^c	0.64 ± 0.010 ^d	0.001 *
Supri FC	0.08 ± 0.009 ^a	0.26 ± 0.010 ^b	0.29 ± 0.03 ^c	0.35 ± 0.03 ^d	0.53 ± 0.030 ^e	0.001 *

Key: SD = standard deviation; test applied: one-way ANOVA with the post hoc Tukey test. The one-way ANOVA: * indicates statistically significant at p < 0.05. The post hoc Tukey test: values with different letters superscripted vary significantly.