Table 1.
Summary of surface microhardness results from bovine and human enamel with artificial white-spot lesions after cycling through a remin/demin model lasting 10 days.
| Substrate | Dentifrice | VHN0 | VHN5 | ΔVHN5 | VHN10 | ΔVHN10 |
|---|---|---|---|---|---|---|
| Bovine Enamel | A | 35.6 ± 3.0a | 51.1 ± 7.7a | 15.5 ± 5.9a | 53.0 ± 8.3a | 17.4 ± 6.0a |
| B | 35.5 ± 2.7a | 59.5 ± 7.7a | 24.0 ± 5.4a,b | 75.6 ± 13.6a,b | 40.2 ± 11.9a,b | |
| C | 35.5 ± 2.7a | 98.3 ± 7.7b | 62.8 ± 7.6c | 119.8 ± 9.2c | 84.3 ± 10.5c | |
| D | 35.6 ± 2.6a | 69.9 ± 4.6a | 34.3 ± 5.0b | 83.4 ± 8.2b | 47.8 ± 9.0b | |
| Human Enamel | A | 40.6 ± 1.91 | 57.7 ± 4.41 | 17.1 ± 4.31 | 66.2 ± 4.91 | 25.6 ± 5.31 |
| B | 40.6 ± 1.41 | 76.5 ± 4.42 | 35.9 ± 4.32 | 107.4 ± 7.82 | 66.8 ± 7.42 | |
| C | 40.8 ± 1.21 | 102.6 ± 6.53 | 61.8 ± 6.53 | 127.8 ± 4.23 | 87.0 ± 4.73 | |
| D | 40.8 ± 1.11 | 91.6 ± 5.42,3 | 50.9 ± 5.42,3 | 146.9 ± 7.34 | 106.2 ± 7.44 |
In each VHN column, superscripts indicate significant differences (ANOVA, p<0.05, LSD) with ranking listed as a<b<c (for bovine enamel) and 1<2<3<4 (for human enamel).
VHN0 = mean baseline Vickers Hardness Number (VHN) ± SEM (N=6 per enamel type); VHN5 = mean VHN ± SEM (N=6 per enamel type) after 5 days of cycling; ΔVHN5 = difference between mean VHN5 ± SEM (N=6 per enamel type) and VHN0 after 5 days of cycling; VHN10 = mean VHN ± SEM (N=6 per enamel type) after 10 days of cycling; ΔVHN10 = difference between mean VHN10 ± SEM (N=6 per enamel type) and VHN0 after 10 days of cycling.