Table 3 Comparison of direct examination and photographic methods in detecting all types of DDE and in detecting hypoplastic DDE in permanent incisors of 90 children.
Type of DDE | Method | Number and percent of subjects with DDE (%) | Number and percent of teeth with DDE (% of all examined teeth) | Mean number of teeth with DDE per child in all 90 children | Mean number of teeth with DDE per affected child | *Number of DDE in all 90 children | *Mean DDE per child in all 90 children | *Mean DDE per affected child | *Mean DDE per affected tooth |
|---|---|---|---|---|---|---|---|---|---|
All types of DDE | Direct examination | 50 (55.6) | 115 (16.0) | 1.3 | 2.3 | 121 | 1.3 | 2.4 | 1.1 |
| Â | Photographic method | 69 (76.7) | 246 (34.2) | 2.7 | 3.6 | 374 | 4.2 | 5.4 | 1.5 |
Hypoplastic DDE | Direct examination | 11 (12.2) | 20 (2.8) | 0.2 | 1.8 | 24 | 0.3 | 2.2 | 1.2 |
| Â | Photographic method | 49 (54.4) | 117 (16.3) | 1.3 | 2.4 | 159 | 1.8 | 3.3 | 1.4 |