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Table 3 Mean and standard deviation (SD) of surface roughness (Ra), and color change (ΔE*) values of the ceramic materials after staining immersion and thermocycling in relation to surface treatment type (t-test)

From: Surface roughness and color measurements of glazed or polished hybrid, feldspathic, and Zirconia CAD/CAM restorative materials after hot and cold coffee immersion

Parameter

Surface treatment type (Mean ± SD)

P value (t-test)

Glazed

Polished

Vita Enamic

   

Surface roughness Pre (Ra1)

1.57 (0.40)

1.98 (0.61)

0.033*

Surface roughness Post (Ra2)

2.08 (0.22)

2.66 (0.22)

0.000*

Mean roughness changes (Ra)

0.51 (0.52)

0.68 (0.49)

0.217

Mean color changes (ΔE*)

3.03 (0.59)

3.12 (0.38)

0.609

Vitablocs Mark II

   

Surface roughness Pre (Ra1)

1.53 (0.53)

1.75 (0.39)

0.813

Surface roughness Post (Ra2)

1.88 (0.62)

2.34 (0.58)

0.043*

Mean roughness changes (Ra)

0.35 (0.31)

0.76 (0.63)

0.025*

Mean color changes (ΔE*)

2.62 (0.22)

2.68 (0.30)

0.592

Vita Suprinity

   

Surface roughness Pre (Ra1)

1.38 (0.45)

2.35 (0.70)

0.000*

Surface roughness Post (Ra2)

2.05 (0.48)

2.83 (0.74)

0.001*

Mean roughness changes (Ra)

0.48 (0.37)

0.67 (0.38)

0.157

Mean color changes (ΔE*)

1.68 (0.61)

2.23 (0.56)

0.012*

  1. * = p≤0.05; Significant