Hardness value | Bond strength value | |||||
---|---|---|---|---|---|---|
Mean | SD | P value | Mean | SD | P value | |
Heptane | 39.2 | 4.80 | <0.001 | 3.0 | 0.42 | <0.001 |
Citric acid | 33.2 | 2.82 | <0.001 | 1.8 | 0.41 | <0.001 |
50% ethanol | 32.3 | 3.56 | <0.001 | 1.2 | 0.30 | <0.001 |
Distilled water | 28.7 | 2.11 | <0.001 | 3.1 | 0.40 | <0.001 |
Control | 22.2 | 2.08 | <0.001 | 3.8 | 0.46 | <0.001 |