Table 3.
Person-level net caries incidence by tooth type and study time period
| Incidence period | Person-level incidence-unerupted surfaces included*-percentage (number of children) | Person-level incidence- only erupted surfaces included**-percentage (number of children) | ||||||
|---|---|---|---|---|---|---|---|---|
| Incisors | Canines | 1st M | 2nd M | Incisors | Canines | 1st M | 2nd M | |
| Age 1 to age 2 | 11.6% (80) | 1.2% (80) | 5.8% (80) | 1.2% (80) | 11.3% (80) | 8.3% (12) | 10.0% (20) | NA (0) |
| Age 1 to age 3 | 28.6% (78) | 3.6% (78) | 19.1% (78) | 14.3% (78) | 23.9% (78) | 8.3% (12) | 20.0% (20) | NA (0) |
| Age 1 to age 4 | 35.6% (67) | 9.6% (67) | 27.4% (67) | 49.3% (67) | 29.9% (67) | 16.7% (12) | 26.3% (19) | NA (0) |
| Age 2 to age 3 | 22.9% (83) | 3.6% (83) | 19.3% (83) | 14.5% (83) | 22.9% (83) | 3.8% (79) | 19.3% (83) | 23.8% (42) |
| Age 2 to age 4 | 33.3% (72) | 9.7% (72) | 27.8% (72) | 50.0% (72) | 33.3% (72) | 10.0% (70) | 27.8% (72) | 52.6% (38) |
| Age 3 to age 4 | 23.3% (73) | 6.9% (73) | 16.4% (73) | 43.8% (73) | 21.9% (73) | 6.9% (73) | 16.4% (73) | 42.5% (73) |
*
When surfaces unerupted at baseline were included (assumed to be sound), there were higher percentages of teeth with new caries during the three-year follow-up on their 2nd molars (49%), followed by incisors (36%), 1st molars (27%) and canines (10%).
**
When only surfaces erupted at baseline were included, there were higher percentages of teeth with new caries during the three-year follow-up on their incisors (30%), followed by 1st molars (26%) and canines (17%).