Fluoride group (N = 40) | Placebo group (N = 38) | ||||
Saliva samples | |||||
Lactobacilli | Candida | Lactobacilli | Candida | ||
Mean counts (×104 CFU/ml) (SD) | Baseline | 1.6 (4.6) | 591.5 (1705.1) | 8 (25.8) | 184.3 (369.3) |
Over 24-months | 6.3 (14.2) | 428.3 (828.2) | 13.7 (45.6) | 291.6 (541.1) | |
Mean counts | |||||
Correlations (r s ) | Lactobacilli | Candida | Lactobacilli | Candida | |
Mean salivary flow rates | Unstimulated whole saliva | −0.37* | −0.67** | 0.44** | −0.77** |
Stimulated whole saliva | −0.38* | −0.69** | −0.39* | −0.77** | |
New lesions (over 24 months) | Enamel lesion | −0.03 | −0.19 | 0.17 | −0.02 |
Dentin lesion | 0.40** | 0.53** | 0.35* | 0.56** | |
Arrested lesion | 0.25 | 0.44** | 0.24 | 0.32 | |
Dental plaque samples | |||||
Lactobacilli | Candida | Lactobacilli | Candida | ||
Mean counts (×106 CFU/g) (SD) | Baseline | 15.8 (62.5) | 60.2 (172.9) | 1.7 (6.3) | 9.5 (20.4) |
Over 24-months | 56.6 (178.9) | 37.2 (73.5) | 119.1 (444.6) | 40.9 (164.0) | |
Mean counts | |||||
Correlations (r s ) | Lactobacilli | Candida | Lactobacilli | Candida | |
Mean salivary flow rates | Unstimulated whole saliva | 0.51** | −0.53** | −0.69** | −0.75** |
Stimulated whole saliva | −0.48** | −0.58** | −0.69** | −0.79** | |
New lesions (over 24 months) | Enamel lesion | 0.11 | −0.05 | 0.04 | −0.04 |
Dentin lesion | 0.44** | 0.45** | 0.47** | 0.48** | |
Arrested lesion | 0.26 | 0.38* | 0.33* | 0.32 |