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Table 2 Two-way ANOVA results for comparison of surface roughness (Ra) and bacterial adhesion (CFU/ml)

From: Surface roughness and Streptococcus mutans adhesion on surface sealant agent coupled interim crown materials after dynamic loading

Parameter

Source

SS

df

MS

F

p

Ra

Interim material (A)

12.775

3

4.258

8.950

 < 0.001*

Surface treatment (B)

1.650

3

0.550

1.56

0.331

A x B

14.919

9

1.658

3.484

0.001*

Error

45.675

96

0.476

  

Total

468.137

112

   

CFU/ml

Interim material (A)

60,067,676.670

3

20,022,558.890

152.179

 < 0.001*

Surface treatment (B)

2,594,065.955

3

864,688.652

6.572

 <0 .001*

A x B

7,002,976.509

9

778,108.501

5.914

 < 0.001*

Error

12,630,959.143

96

131,572.491

  

Total

217,765,083.000

112

   
  1. SS sum of squares; df degrees of freedom; MS mean square
  2. *P < 0.05 indicates statistical significance