Table 2.
Comparison of mean microhardness values for radicular dentin before and after immersion into respective solutions
| Groups | Before and after immersion | n | Mean±SD | P |
|---|---|---|---|---|
| Group 1 (distilled water) | Before | 20 | 65.840±6.4994 | 0.478 |
| After | 20 | 63.960±6.7183 | ||
| Group 2 (10% citric acid) | Before | 20 | 68.665±4.3518 | 0.001* |
| After | 20 | 41.640±2.6321 | ||
| Group 3 (2% acetic acid) | Before | 20 | 66.710±5.8484 | 0.001* |
| After | 20 | 58.585±5.2636 | ||
| Group 4 (20% tartaric acid) | Before | 20 | 66.285±5.5026 | 0.681 |
| After | 20 | 65.775±4.8010 |
*P≤0.05 considered statistically significant. Test: Wilcoxon signed-rank test. Values are mentioned in VHN. n: Number of samples, VHN: Vickers hardness number, SD: Standard deviation