| water | 0.43 |
| strengthen tooth | 0.60 |
| prevent tooth decay | 0.52 |
| protect tooth | 0.50 |
| help prevent cavity | 0.48 |
| strengthen enamel | 0.38 |
| harm horse | 0.25 |
| promote remineralization | 0.25 |
| prevent decay | 0.21 |
| become less effective | 0.16 |
| help to decrease the ri… | 0.16 |
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| dental fluorosis | 0.21 |
| important | 0.54 |
| toxic | 0.46 |
| helpful | 0.44 |
| safe | 0.40 |
| controversial | 0.21 |
| occurring element | 0.24 |
| added to toothpaste | 0.68 |
| added in 1914 | 0.33 |
| important to dental hea… | 0.29 |
| applied to tooth | 0.25 |
| swallowed | 0.16 |