1. Oral Health Training & Calibration Programme
Occlusal Status Age 12-59

2. Occlusal Conditions Age 12-59
0 Acceptable occlusion
1 Anterior crossbite
2 Severe crowding (> 4mm)
3 Severe spacing (> 4mm)
4 Posterior crossbite
5 Anterior open bite (> 1 mm)
6 Excessive overbite (100% or more)
7 Excessive overjet (> 9 mm)
8 Midline shift (> 4 mm)

3. 0. Acceptable Occlusion

4. 1. Anterior Cross Bite

5. Assessment of crowding
The widths of all the teeth anterior to the molars are measured and subtracted from the sum of two measurements (mesial of the lower incisor to the distal of the lower canine, plus distal of lower canine to the mesial of the first molar) to give the degree of crowding.
(D. Roberts-Harry and J. Sandy British Dental Journal (2003); 195, ).

6. 2. Severe crowding

7. 2. Crowding >4mm

8. 3. Anterior Spacing >4mm

9. 4. Posterior Cross Bite

10. 5. Ant open bite >1mm

11. Measuring

12. 6. Excessive Overbite 100%+

13. 7. Overjet > 9mm

15. 8. Midline shift > 4mm?