Angle classification Extraoral features ORTHOPAEDIC APPLIANCES MYOFUNCTIONAL APPLIANCES ORTHODONTIC CAMOUFLAGE ORTHOGNATHIC SURGERY

1. classIIImalocclusion

2. Angle classified as
1.True or skeletal class III
▪ Mandibular hypertrophy
▪ Marked shortening of midface
▪ combination
CLASSIFICATION

3. 2. Pseudo or functional or postural class III
▪ Occlusal prematurities
▪ Premature loss of deciduous posteriors
▪ Enlarged adenoids
3. Class III , Subdivision
▪ Class III on one side and class I on other
Classification…

4. CLINICAL FEATURES
Extraoral features :
1. Concave profile
2. Anterior facial divergence
3. Retrusive nasomaxillary area
4. Prominent lower third of face/chin
5. Steep mandibular plane angle
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5. Caucasians – 1% to 4%
Africans-Americans – 5% to 8%
Asians –
Japanese - 4% to 13%
Chinese - 4% to 14%
FREQUENCY
Indians - 4.1%

6. Intraoral features :
1. Class III molar and canine relationship
2. Narrow upper arch
3. Decreased or reverse overjet
4. Crowding in upper arch and spaced lower arch
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7. TREATMENT
PROTOCOL
GROWING
PATIENTS
SKELETAL DENTAL
NONGROWING
PATIENTS
DENTAL SKELETAL
Orthopedic /
myofunctional
appliances
Orthognathic
surgery
Orthodontic
treatment as
needed
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8. MYOFUNCTIONAL APPLIANCES
Treatment…
FRANKEL III REGULATOR (FR III)
More successful in patients with functional shift on
closure
Increased overbite of 4-5 mm
Early mixed dentition
Also, as a retentive device after maxillary protraction

9. 1. FACE MASK
Used in patients with mild to moderate Class
III with maxillary retrusion
2 pads connecting soft tissue in forehead
and chin region
ORTHOPAEDIC APPLIANCES
Treatment…

10. 2. CHIN CUP
Used in skeletal Class III malocclusion with
a relative normal maxilla and a moderately
protrusive mandible
Two types:
- Occipital pull
- Vertical pull
Treatment…

11. ORTHODONTIC CAMOUFLAGE
Indications :
Skeletal discrepancies not resolved during mixed
dentition
Malocclusions recurring during adolescence after
treatment in childhood
Mild mandibular prognathism and moderate crowding
Types :
With extractions
Without extractions
Treatment…

12. Class III elastics :
From upper molar to lower anteriors
Corrects molar relation by moving the
molar mesially
Retraction of lower anteriors

13. ORTHOGNATHIC SURGERY
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Indications :
Continued disproportionate sagittal and vertical growth
Severe skeletal maxillary retrusion and mandibular
prognathism or both
Non-growing patients
Cleft lip and palate
Facial asymmetries
Treatment…

14. THANK YOU FOR YOU
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