Table 4.
Mean Vickers hardness number and standard deviation (SD) values of groups at various measurement depths under different ceramic thicknesses with different LCUs.
| Thickness | ||||||
|---|---|---|---|---|---|---|
| Measurement Depth (µm) | Light Source | Z | Z1 | Z2 | Z3 | p |
| Mean±SD | Mean±SD | Mean±SD | Mean±SD | |||
| 100 | QTH | 66.78±4.36 | 58.85±41 | 52.77±2.50 | 49.37±2.26 | 0.001** |
| LED | 69.95±5.35 | 65.26±2.55 | 62.80±2.83 | 52.10±3.47 | 0.001** | |
| 300 | QTH | 60.52±45 | 54.35±5.89 | 48.29±1.80 | 46.20±1.25 | 0.001** |
| LED | 62.67±4.70 | 58.00±4.14 | 54.15±2.73 | 49.33±4.82 | 0.001** | |
| 500 | QTH | 48.71±2.68 | 44.15±1.79 | 41.34±3.44 | 37.88±2.54 | 0.001** |
| LED | 53.15±7.64 | 49.00±3.89 | 43.64±2.52 | 39.41±3.37 | 0.001** | |
One-way ANOVA test ** p<0.01