Table 1: Range of therapeutic fluoride concentrations used to prevent caries [30, 31].
| Method/vehicle | Fluoride concentration (ppm F) |
| Water supplies | 0.7-1.2 |
| Fluoridated salt | 200-250 |
| Mouth rinse, daily | 230 |
| Dentifrices, children | 250-500 |
| Mouth rinse, weekly | 920 |
| Dentifrices, adult | 1,000-1,500 |
| Self-applied gels or rinses, prescription | 5,000 |
| Professionally applied solutions (NaF) | 9,200 |
| Professionally applied solutions, gels, foams (APF) | 12,300 |
| Professionally applied solutions (SnF2) | 19,500 |
| Professionally applied varnishes | 22,600 |