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The distribution of local, chronological and non-chronological defects
| N (% total) | Affected teeth | N (% total) | |
|---|---|---|---|
| Local | 52 (6.5%) | Anterior teeth | 42 (5.2%) |
| Other teeth | 10 (1.3%) | ||
| Chronological | 119 (15%) | FPM and incisors (FP&I) | 104 (13%) |
| Other chronological | 15 (2%) | ||
| Non-chronological | 93 (12%) | Generalised | 67 (8%) |
| FPM&I plus 1–2 other teeth | 18 (2%) | ||
| < 4 teeth | 8 (1%) |
