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Frequency distribution of dental trauma subjects as per Andresen's epidemiological classification of traumatic injuries to anterior teeth, including WHO codes.
| WHO Classification | N | % |
|---|---|---|
| No Trauma | 3391 | 90.1 |
| Treated Dental Injury | 27 | 0.7 |
| Enamel Fracture only | 247 | 6.6 |
| Enamel/Dentin Fracture | 78 | 2.1 |
| Pulp Injury | 10 | 0.27 |
| Missing Tooth due to trauma | 9 | 0.23 |
| Excluded tooth | 0 | 0.0 |
