Post on 16-Dec-2015
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.
ahmed.almayali@uokufa.edu.iq
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