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Table 3 Mean and standard deviation for the surface roughness of the two studied universal shade composites

From: Color stability and surface roughness of ormocer- versus methacrylate-based single shade composite in anterior restoration

 

Ormocer-based composite

Methacrylate-based composite

Ra-baseline

Ra-delayed

Ra-baseline

Ra-delayed

Saliva

0.253 ± 0.0023

0.253 ± 0.0046

0.254 ± 0.0031

0.255 ± 0.0009

Tea

0.252 ± 0.0035

0.254 ± 0.002#

0.255 ± 0.002

0.256 ± 0.0014

Cola

0.253 ± 0.003

0.257 ± 0.002#b

0.256 ± 0.0019

0.258 ± 0.0017#bc

  1. Data are expressed as the mean ± SD
  2. SD standard deviation; P Probability significance when < 0.05
  3. aSignificance between Saliva & Tea
  4. bSignificance between Saliva & Cola
  5. cSignificance between Tea & Cola (Test used: one way ANOVA followed by post-hoc Tukey)
  6. *Significance between Ra-baseline or Ra-delayed either for ormocer-based composite versus methacrylate-based composite either at baseline or delayed time. (Test used: unpaired student’s t-test)
  7. #Significance between Ra-baseline and Ra-delayed either for ormocer-based composite or methacrylate-based composite (Test used: paired student’s t-test) View full size image