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The relation between traumatic injuries of the primary frontal teeth, before and after 3 year of age, and developmental defects of the enamel (DDE) in the permanent frontal teeth
| Trauma | No trauma | Total | ||
|---|---|---|---|---|
| 0–3 years | ||||
| DDE front teeth | 52 | 121 | 173 | |
| No DDE front teeth | 100 | 523 | 623 | |
| Total | 152 | 644 | 796 | OR 2.3, CI 1.6–3.4 |
| 4–6 years | ||||
| Front teeth DDE | 23 | 150 | 173 | |
| No front teeth DDE | 62 | 561 | 561 | |
| Total | 85 | 711 | 796 | OR 1.4, CI 0.8–2.3 |
