Table 2 Different types of lesions at the subject and surface levels
12-month | 24-month | |||||
|---|---|---|---|---|---|---|
Group | Fluoride group (N = 40) | Placebo group (N = 38) | p-value | Fluoride group (N = 40) | Placebo group (N = 38) | p-value |
Number of subjects (%) | ||||||
No caries | 15 (37.5) | 19 (50) | N.S. | 11 (27.5) | 12 (31.8) | N.S. |
Enamel lesion | 19 (47.5) | 15 (39.4) | N.S. | 21 (52.5) | 18 (47.4) | N.S. |
Dentin lesion | 4 (10) | 8 (21.1) | 13 (32.5) | 16 (42.1) | ||
Arrested lesion | 7 (17.5) | 5 (13.2) | 10 (25.0) | 14 (37.5) | ||
Number of surface | ||||||
Enamel lesion | ||||||
Sum | 41 | 34 | N.S. | 64 | 60 | N.S. |
Mean (SD) | 1.0 (1.5) | 0.9 (1.5) | 1.6 (2.3) | 1.6 (2.5) | ||
Range | 0–6 | 0–7 | 0–10 | 0–11 | ||
Dentin lesion | ||||||
Sum | 8 | 35 | N.S. | 55 | 78 | N.S. |
Mean (SD) | 0.2 (0.6) | 0.9 (2.4) | 1.4 (2.6) | 2.1 (4.2) | ||
Range | 0–3 | 0–11 | 0–11 | 0–22 | ||
Arrested lesion | ||||||
Sum | 17 | 13 | N.S. | 22 | 25 | N.S. |
Mean (SD) | 0.4 (1.2) | 0.3 (1.2) | 0.6 (1.3) | 0.7 (1.3) | ||
Range | 0–6 | 0–6 | 0–7 | 0–7 | ||