Table 2.
Mean difference of L∗, a∗, and b∗ values and color difference (ΔE00) between the color of the total assembly compared with zirconia samples alone summarized for all test groups.
| Group | Comparison zirconia/total assembly, mean value (SD) | |||||
|---|---|---|---|---|---|---|
| Surface conditioning | Cement type | Zirconia thickness (mm) | ΔL∗ | Δa∗ | Δb∗ | ΔE00 |
| S | PO | 0.7 | 6.5 (0.7) | −1.3 (0.2) | 4.6 (0.7) | 5.6 (0.6) |
| 1.0 | 7.2 (0.6) | −0.1 (0.4) | 5.7 (1.2) | 6.2 (0.6) | ||
| PC | 0.7 | −9.7 (0.5) | −2.3 (0.1) | −11.8 (0.7) | 11.7 (0.3) | |
| 1.0 | −7.2 (0.9) | - 2.4 (0.1) | −9.8 (0.7) | 9.2 (0.6) | ||
|
| ||||||
| SA | PO | 0.7 | 8.1 (0.5) | −1.1 (0.3) | 4.7 (1.0) | 6.7 (0.4) |
| 1.0 | 6.5 (0.6) | −0.2 (0.2) | 6.2 (1.8) | 5.9 (0.9) | ||
| PC | 0.7 | −10.0 (0.5) | −2.2 (0.1) | −9.6 (0.5) | 10.9 (0.3) | |
| 1.0 | −8.5 (1.0) | −2.5 (0.1) | −7.5 (1.0) | 9.0 (0.6) | ||
|
| ||||||
| PA | PO | 0.7 | 7.3 (0.7) | −1.3 (0.3) | 5.3 (0.7) | 6.3 (0.4) |
| 1.0 | 6.3 (0.3) | −0.2 (0.2) | 6.6 (0.8) | 6.0 (0.3) | ||
| PC | 0.7 | −6.1 (0.4) | −1.4 (0.1) | −4.8 (0.5) | 6.0 (0.3) | |
| 1.0 | −5.5 (0.4) | −1.4 (0.1) | −4.8 (0.6) | 5.5 (0.3) | ||
|
| ||||||
| PEA | PO | 0.7 | 6.2 (0.3) | −1.5 (0.2) | 4.2 (1.1) | 5.5 (0.4) |
| 1.0 | 6.4 (1.1) | −0.4 (0.4) | 5.0 (1.0) | 5.6 (0.7) | ||
| PC | 0.7 | −8.5 (0.8) | −1.9 (0.3) | −8.6 (0.8) | 9.2 (0.7) | |
| 1.0 | −6.5 (0.7) | −2.0 (0.1) | −9.0 (0.7) | 8.1 (0.4) | ||
Abbreviations: PA, polishing and anodization; PC, translucent cement; PEA, polishing, etching, and anodization; PO, opaque cement; S, sandblasting; SA, sandblasting and anodization; SD, standard deviation.