3: Diagnostic components in orthodontics
3.1. The orthodontic treatment index: dental health components
Grade Characteristics
1: None Extremely minor malocclusions including displacements <1 mm
2: Little a. Increased overjet 3.5 mm but ≤6 mm with competent lips
b. Reverse overjet 0 mm but ≤1 mm
c. Anterior or posterior crossbite with ≤1 mm discrepancy between retruded contact position and intercuspal position
d. Displacement of teeth 1 mm but ≤2 mm
e. Anterior or posterior open bite 1 mm but ≤2 mm
f. Increased overbite ≥3.5 mm without gingival contact
g. Prenormal or postnormal occlusions with no other anomalies; includes up to half a unit discrepancy
3: Moderate a. Increased overjet 3.5 mm but ≤6 mm with incompetent lips
b. Reverse overjet …show more content…
Severe displacements of teeth 4 mm
e. Extreme lateral or anterior open bites 4 mm
f. Increased and complete overbite with gingival or palatal trauma
h. Less extensive hypodontia, requiring prerestorative orthodontics or orthodontic space closure to obviate the need for a prosthesis
i. Posterior lingual crossbite with no functional occlusal contact in one or both buccal segments
m. Reverse overjet 1 mm but 3.5 mm, with recorded masticatory and speech difficulties
t. Partially erupted teeth, tipped and impacted against adjacent teeth
x. Supplemental teeth
5: Very Great a. Increased overjet 9 mm
h. Extensive hypodontia with restorative implications (more than one tooth missing in any quadrant) requiring prerestorative orthodontics
i. Impeded eruption of teeth (with the exception of third molars) owing to crowding, displacement, the presence of supernumerary teeth, retained deciduous teeth and any pathological cause
m. Reverse overjet 3.5 mm with reported masticatory and speech difficulties
p. Defects of cleft lip and palate
s. Submerged deciduous teeth
From Heasman P 2008 Master Dentistry Vol. 2, Restorative Dentistry, Paediatric Dentistry and Orthodontics, 2nd edn. Churchill Livingstone, Edinburgh, with
3.1. The orthodontic treatment index: dental health components
Grade Characteristics
1: None Extremely minor malocclusions including displacements <1 mm
2: Little a. Increased overjet 3.5 mm but ≤6 mm with competent lips
b. Reverse overjet 0 mm but ≤1 mm
c. Anterior or posterior crossbite with ≤1 mm discrepancy between retruded contact position and intercuspal position
d. Displacement of teeth 1 mm but ≤2 mm
e. Anterior or posterior open bite 1 mm but ≤2 mm
f. Increased overbite ≥3.5 mm without gingival contact
g. Prenormal or postnormal occlusions with no other anomalies; includes up to half a unit discrepancy
3: Moderate a. Increased overjet 3.5 mm but ≤6 mm with incompetent lips
b. Reverse overjet …show more content…
Severe displacements of teeth 4 mm
e. Extreme lateral or anterior open bites 4 mm
f. Increased and complete overbite with gingival or palatal trauma
h. Less extensive hypodontia, requiring prerestorative orthodontics or orthodontic space closure to obviate the need for a prosthesis
i. Posterior lingual crossbite with no functional occlusal contact in one or both buccal segments
m. Reverse overjet 1 mm but 3.5 mm, with recorded masticatory and speech difficulties
t. Partially erupted teeth, tipped and impacted against adjacent teeth
x. Supplemental teeth
5: Very Great a. Increased overjet 9 mm
h. Extensive hypodontia with restorative implications (more than one tooth missing in any quadrant) requiring prerestorative orthodontics
i. Impeded eruption of teeth (with the exception of third molars) owing to crowding, displacement, the presence of supernumerary teeth, retained deciduous teeth and any pathological cause
m. Reverse overjet 3.5 mm with reported masticatory and speech difficulties
p. Defects of cleft lip and palate
s. Submerged deciduous teeth
From Heasman P 2008 Master Dentistry Vol. 2, Restorative Dentistry, Paediatric Dentistry and Orthodontics, 2nd edn. Churchill Livingstone, Edinburgh, with