Table 1.
Descriptive statistics of the Vickers hardness number (VHN) and analysis of variance (ANOVA) test for the experimental groups.
| Descriptive statistic |
ANOVA |
|||||
|---|---|---|---|---|---|---|
| Group | Level | N | Mean VHN | Std. Deviation | P-value | Significance |
| Control | Coronal | 10 | 65.33 | 0.69929 | <0.001 | HS |
| Middle | 10 | 62.28 | 0.56725 | |||
| Apical | 10 | 55.33 | 0.80561 | |||
| Electrochemical | Coronal | 10 | 65.25 | 0.8182 | <0.001 | HS |
| Middle | 10 | 62.14 | 0.63105 | |||
| Apical | 10 | 55.01 | 0.3414 | |||
| Chemical | Coronal | 10 | 65.19 | 0.86852 | <0.001 | HS |
| Middle | 10 | 62.09 | 0.48865 | |||
| Apical | 10 | 55 | 0.8165 | |||
P < 0.001; HS, highly significant.