Vickers hardness number measured after lesion formation, pH cycling, and an increase in Vickers hardness number (ΔVHN) of each enamel group
| Group | Mean±standard deviation | ||||||
|---|---|---|---|---|---|---|---|
| Drying (n=10) | Salivary contamination (n=10) | ||||||
| VHNlesion | VHNpost | ΔVHN | VHNlesion | VHNpost | ΔVHN | ||
| Control | 53.00±3.63 | 70.05±1.79 | 17.05±4.81a,A | 51.62±2.14 | 69.66±2.93 | 18.03±3.49a,A | |
| AF | 52.37±2.92 | 105.81±4.51 | 53.44±5.24b,A | 52.18±1.24 | 97.95±8.34 | 45.77±8.58b,B | |
| DF | 52.54±2.32 | 112.14±8.07 | 59.60±8.39b,A | 52.09±1.59 | 103.32±7.47 | 51.23±7.38b,B | |
| NF | 51.53±3.20 | 91.10±4.41 | 39.57±5.77c,A | 51.62±6.11 | 81.46±5.62 | 29.83±6.33c,B | |
| p | 0.942 | <0.0001 | <0.0001 | 0.808 | <0.0001 | <0.0001 |
VHN: Vickers Hardness Number.
a,b,cThe lowercase letters indicate statistically significant differences between agents by Mann-Whitney U test (p<0.0083). A,BThe uppercase letters indicate statistically significant differences between surface conditions by Mann-Whitney U test (p<0.05).
p-value from Kruskal-Wallis test.
