general factors the etiology of malocclusion local factors skeletal factor muscle factor dental...
TRANSCRIPT
General factors
The Etiology of malocclusion
Local factors
Skeletal factor
Muscle factor
Dental factor
Local factors affecting occlusal development
Dr. Ahmed AL-MayaliB.D.S M.Sc. Ortho.
Local factors affecting occlusal development
1 • Aberrant position of individual teeth
2 • Supernumerary teeth
3• Developmental hypodontia
4• The labial frenum
5• Thumb or finger sucking
Aberrant developmental position of individual teeth
•Upper canine…...lower 3rd molar upper central incisor …...lower central incisor
• Trauma•Congenital displaced
Radiography
1 • Intra-oral (periapical)
2 • Anterior occlusal and oblique occlusal
3• Rotational tomography ( O.P.G )
4 •Postero-anterior and true lateral
1-Removal of the tooth.2-Alignment into the dental arch with appliances.3-Immediate repositioning of the tooth by extraction and reimplantation.4-No treatment.
form …incisors…..coniform & molars
position …..more teeth…….spacing
growth of the jaws. Basal part Alveolar part Vertical ,transverse, anteroposterior
The effect of hypodontia on dental occlusion
1-low and thick attachment 2-Hypodontia.3-Proclination of incisors.4-General spacing.5-The presence of supernumerary teeth.6-Ugly duckling stage.
causes of upper median diastema