Transcript Dental factors

Dental factors affecting
occlusal development
Dr. Ahmed AL-Mayali
B.D.S M.Sc. Ortho.
[email protected]
•
• The size of the dentition in
relation to jaw size
Dental arch crowding
theories
• First theory
• Decrease jaw
• Primitive diet
Soft diet
Modern diet is largely responsible for crowding
Second theory
• Interbreeding of people
The effects of excessive
dentition size
• 1-Overlapping and displacement of
teeth.
.
2-Impaction of teeth
Space closure after
extraction
Less in incisor
More in upper jaw
Primary ………..28 months
Permanent ……3…9………
The effects of early loss of
primary teeth
• 1-Effect on function and oral health
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Masticatory
Speech
Remove infection
Reduce caries
2-Over eruption of
opposing teeth
3-Psychological effects on
child and parents
4- Effect on the position of
permanent teeth
How premature loss of
primary teeth can affect the
position of permanent teeth?
A-When there is ample space
in the dental arch
B- When there is just enough space
for the permanent teeth to erupt
without crowding
C- When there is slight crowding
potential in the dental arch for the
permanent teeth
D- When there is severe crowding
potential in the dental arch for the
successional teeth
The effects of asymmetric
loss of primary teeth
Space maintenance
• Space maintainer
Types of space maintainer
• 1-Removable space
maintainer
2-Fixed space maintainer
Thank you
for
listening