Table 2.
Kruskal-Wallis analysis of Mean color change between different all ceramic restorations.
| Decoloring Solutions | Group | Mean Rank | ChiSquare | Df | p Value |
|---|---|---|---|---|---|
| Coffee | LD ceramics | 6.10 | 19.886 | 2 | 0.000 * |
| Monolithic zirconia | 23.40 | ||||
| Bilayer Zirconia | 17.00 | ||||
| Green Tea | LD ceramics | 13.40 | 10.025 | 2 | 0.007 * |
| Monolithic zirconia | 22.50 | ||||
| Bilayer Zirconia | 10.60 | ||||
| Chlorhexidine | LD ceramics | 12.50 | 12.062 | 2 | 0.002 * |
| Monolithic zirconia | 23.30 | ||||
| Bilayer Zirconia | 10.70 |
Df: degrees of freedom, LD: Lithium disilicate; * The mean difference is significant at the 0.05 level.