Table 1 Comparison of color change (∆E₀₀) between groups from 1st to 10th year using ANOVA and Post Hoc tests

1st year

0.07 ± 0.03 ^Cf

0.07 ± 0.03 ^Cg

0.42 ± 0.14 ^Bh

0.57 ± 0.13 ^Ai

60.402

< 0.001**

2nd year

0.07 ± 0.03 ^Df

0.42 ± 0.06 ^Ci

0.55 ± 0.13 ^Bg

0.78 ± 0.04 ^Ai

129.634

< 0.001**

3rd year

0.07 ± 0.03 ^Df

0.57 ± 0.13 ^Ch

1.12 ± 0.08 ^Bf

2.45 ± 0.09 ^Ag

1140.334

< 0.001**

4th year

0.07 ± 0.03 ^Df

0.78 ± 0.04 ^Cg

1.49 ± 0.10 ^Be

3.90 ± 0.09 ^Af

4772.525

< 0.001**

5th year

0.07 ± 0.05 ^Df

0.93 ± 0.07 ^Cf

2.45 ± 0.09 ^Bd

4.51 ± 0.08 ^Ae

5806.953

< 0.001**

6th year

0.57 ± 0.13 ^De

1.12 ± 0.08 ^Ce

3.90 ± 0.09 ^Bc

4.66 ± 0.07 ^Ad

4066.535

< 0.001**

7th year

0.78 ± 0.04 ^Dd

1.49 ± 0.10 ^Cd

4.51 ± 0.08 ^Bb

6.07 ± 0.06 ^Ac

9892.402

< 0.001**

8th year

0.93 ± 0.07 ^Dc

2.45 ± 0.09 ^Cc

4.66 ± 0.07 ^Ba

6.19 ± 0.07 ^Ab

8198.000

< 0.001**

9th year

1.12 ± 0.08 ^Db

3.90 ± 0.09 ^Cb

4.66 ± 0.07 ^Ba

7.15 ± 0.09 ^Aa

7761.688

< 0.001**

10th year

1.49 ± 0.10 ^Ca

4.51 ± 0.08 ^Ba

4.66 ± 0.07 ^Ba

7.15 ± 0.09 ^Aa

6353.013

< 0.001**

RM ANOVA

41.403

157.096

108.352

112.765

P-value

< 0.001**

< 0.001**

< 0.001**

< 0.001**