Table 3.
Total number of proximal surfaces diagnosed as “healthy”, caries restricted to “enamel” and caries extending into “dentin” by the five evaluators (400 proximal faces), distributed according to the different variations of brightness and contrast
| Brightness and contrast variations | Gold-standard (micro-CT) |
Total (n = 400) |
||
|
Healthy (n = 160) |
Enamel (n = 140) |
Dentine (n = 100) |
||
| V1 | ||||
| Healthy | 140 (87.5) | 92 (65.7) | 47 (47) | 279 |
| Enamel | 16 (10) | 40 (28.6) | 35 (35) | 91 |
| Dentine | 4 (2.5) | 8 (5.7) | 18 (18) | 30 |
| V2 | ||||
| Healthy | 139 (86.9) | 90 (64.3) | 45 (45) | 274 |
| Enamel | 20 (12.5) | 48 (34.3) | 40 (40) | 108 |
| Dentine | 1 (0.6) | 2 (1.4) | 15 (15) | 18 |
| V3 | ||||
| Healthy | 138 (86.3) | 94 (67.1) | 46 (46) | 278 |
| Enamel | 19 (11.9) | 41 (29.3) | 40 (40) | 100 |
| Dentine | 3 (1.9) | 5 (3.6) | 14 (14) | 22 |
| V4 | ||||
| Healthy | 147 (91.9) | 101 (72.1) | 52 (52) | 300 |
| Enamel | 12 (7.5) | 35 (25) | 36 (36) | 83 |
| Dentine | 1 (0.6) | 4 (2.9) | 12 (12) | 17 |
| V5 | ||||
| Healthy | 157 (98.1) | 119 (85) | 69 (69) | 345 |
| Enamel | 3 (1.9) | 21 (15) | 25 (25) | 49 |
| Dentine | 0 (0) | 0 (0) | 6 (6) | 6 |
p > 0.001 according to McNemar Bowker test, for all brightness and contrast variations evaluated.