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IMPACTION—A
tooth which fails to erupt in normal anatomical position either
due to lack of space or due to obstruction from tooth, bone
or soft tissue.
1.
Causes
1.
LOCAL
-
Irregularity in the position and pressure of an adjacent
tooth.
- Density
of the overlying or surrounding bone.
- Chronic
inflammation with resultant fibrosis of the overlying
mucosa.
- Lock
of space due to under developed jaws.Unduly over retention
of the deciduous teeth.
- Premature
loss of deciduous teeth.
- Acquired
disease such as necrosis due to infection.
- Inflammatory
changes in the bone due to exanthematous diseases in children,
like, Chicken pox, Parotiditis.
2.
SYSTEMIC
a.
Prenatal
i. Heredity
ii. Miscegenation
iii. Syphilis
iv. Tuberculosis
v. Malnutrition
b.
Post Natal
i.
Rickets
ii. Anemia
iii. Endocrine dysfunctions.
iv. Diseases of jaw and surrounding tissue
Rare
Conditions
a. Cleidocranial dysostosis
b. Oxycephaly
c. Progeria
d. Achondroplasia
e. Cleft palate
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