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Dennis J Norheim dentist

BY Dennis J Norheim | 12-08-2009 | 12:21 PM
This blog is written by a member of our blogging community and expresses that member's views alone.

Dennis Norheim dentist  - Dennis J Norheim DDS

Tooth eruption in humans is a process in tooth development in which the
teeth enter the mouth and become visible. Current research indicates
that the periodontal ligaments play an important role in tooth
eruption. Primary teeth erupt into the mouth from around six months
until two years of age. These teeth are the only ones in the mouth
until a person is about six years old. At that time, the first
permanent tooth erupts. This stage, during which a person has a
combination of primary and permanent teeth, is known as the mixed
stage. The mixed stage lasts until the last primary tooth is lost and
the remaining permanent teeth erupt into the mouth.

In England, the 1878 British Dentists Act and 1879 Dentists Register
limited the title of "dentist" and "dental surgeon" to qualified and
registered practitioners. The practice of dentistry in the United
Kingdom became fully regulated with the 1921 Dentists Act, which
required the registration of anyone practicing dentistry. The British
Dental Association, formed in 1880 with Sir John Tomes as president,
played a major role in prosecuting dentists practicing illegally.

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Alteration of eruption

Tooth eruption may be altered by some environmental factors. When
eruption is prematurely stopped, the tooth is said to be impacted. The
most common cause of tooth impaction is lack of space in the mouth for
the tooth. Other causes may be tumors, cysts, trauma, and thickened
bone or soft tissue. Ankylosis of a tooth occurs when the tooth has
already erupted into the mouth but the cementum or dentin has fused
with the alveolar bone. This may cause a person to retain their primary
tooth instead of having it replaced by a permanent one.

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Abnormality in structure

Amelogenesis imperfecta is a condition in which enamel does not
form properly or at all. Dentinogenesis imperfecta is a condition in
which dentin does not form properly and is sometimes associated with
osteogenesis imperfecta. Dentin dysplasia is a disorder in which the
roots and pulp of teeth may be affected. Regional odontodysplasia is a
disorder affecting enamel, dentin, and pulp and causes the teeth to
appear "ghostly" on radiographs

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