Table 1.
Malocclusion | Severity grade | |||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | ||
A | Craniofacial Anomalies | Cleft palate and syndromes | ||||
U |
Missing teeth |
Agenesis or loss | ||||
S | Disturbance in tooth eruption | Impaction | Displacement | |||
D |
Sagittal discrepancy increased overjet |
< 3 mm | 3–6 mm | > 6–9 mm | > 9 mm | |
M |
Sagittal discrepancy negative overjet |
0–3 mm | > 3 mm | |||
O |
Vertical discrepancy open bite |
< 1 mm | > 1–2 mm | > 2–4 mm | > 4 mm, habitually open | > 4 mm, skeletally open |
T |
Vertical discrepancy deep bite |
> 1–3 mm | > 3 mm, with / without mucosal contact | > 3 mm, with traumatic mucosal impingement | ||
B | Transverse discrepancy | Scissors bite | ||||
K |
Transverse discrepancy crossbite |
Buccolingually cusp-to-cusp relation |
Bilateral crossbite | Unilateral crossbite | ||
E | Contact point displacement | < 1 mm | > 1–3 mm | > 3–5 mm | > 5 mm | |
P |
Space deficiency |
< 3 mm | > 3–4 mm | > 4 mm |