Table 1 Orthodontic indication groups (KIG) according to the guidelines of the federal committee of dentists and health insurance funds for orthodontic treatment (figures in mm, “- “ = not applicable)
KIG | Description | Grade 1 | Grade 2 | Grade 3 | Grade 4 | Grade 5 |
|---|---|---|---|---|---|---|
A | Craniofacial anomalies | - | - | - | - | (Cleft palate and syndromes) |
U | Missing teeth (Agenesis or loss) | - | - | - | missing teeth | - |
S | Disturbance in tooth eruption | - | - | - | impaction (except for third molars) | displacement (except for third molars) |
D | Sagittal discrepancy increased overjet | ≤ 3 | > 3, ≤ 6 | - | > 6, ≤ 9 | > 9 |
M | Sagittal discrepancy negative overjet | - | - | - | 0, ≤ 3 | > 3 |
O | Vertical discrepancy open bite | ≤ 1 | > 1, ≤ 2 | > 2, ≤ 4 | > 4 habitually open | > 4 skeletally open |
T | Vertical discrepancy deep bite | > 1, ≤ 3 | > 3 with / without mucosal contact | > 3 with traumatic mucosal impingement | - | - |
B | Transverse discrepancy scissors bite | - | - | - | Scissors bite | - |
K | Transverse discrepancy crossbite | - | Buccolingually cusp-to-cusp relation | Bilateral crossbite | unilateral crossbite | - |
E | Contact point displacement | < 1 | > 1, ≤ 3 | > 3, ≤ 5 | > 5 | - |
P | Space deficiency | - | ≤ 3 | > 3, ≤ 4 | > 4 | - |