radiographic interpretation of part 2))dental anomalies · radiographic interpretation of dental...
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Radiographic interpretation
of
part 2))Dental Anomalies
By
Ahmed M bakry
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5-Variation in structure
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Amelogenesis imperfecta
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Hypoplastic type
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Hypocalcified type
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Hypoplastic type
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Dentinogenesis imperfecta
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Regional adontodysplasia
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Aequired abnormalities
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Acquired changes of the dentition,
those that are initiated
development of the tooth, range after
severity in
from changes that have no clinical
significance to those
that cause tooth loss.
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ATTRITION
Attrition is the
physiologic
away ofwearing
tooth structure. Note
the severe wearing
of almost the total
coronal aspect of
these mandibular
incisors.
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Abrasion
is the nonphysiologic wearing away of teeth by
contact with foreign substances. It results from friction
occupational or habits induced by factitious. hazards
improper tooth brushing
and improper or excessive use of dental floss. Other
causes include pipe smoking, opening hairpins with the
teeth, improper use of toothpicks, denture clasps.
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portionl cervicaAbrasion of the of these
teeth is evident from excessive improper) use of dental(and
of the obliteration. Note the flossand reduction pulp chambers
of the root canals. size in
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Abrasion on the
distal aspect
of the maxillary
cuspid due to a
.denture clasp
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EROSION
Erosion of teeth results from a chemical action not involving bacteria.
The source of the acid may be
(1) chronic vomiting or acid reflux from gastrointestinal disorders or
(2) a diet in which the individual consumes large
amounts of acidic foods .
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RESORPTION
by the removal of tooth structureis Resorptionosteoclasts, referred to as odontoclast when they are resorbing tooth structure.
on the basis of the classifiedis Resorptionsurface of the tooth being resorbed.
1-external resorption
2-internal resorption
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Internal resorption
the pulp occurs within resorptionInternal chamber
of the resorption involvesor canal and surrounding
in enlargement of the resultsdentin. This size of the
pulp space at the expense of tooth structure.
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EXTERNAL RESORPTION
of the outer surfaceresorb the odontoclasts
tooth.
This most commonly involves the root
surface but may also involve the crown of
an unerupted tooth. The resorption may
and in and dentin cementuminvolve
some cases gradually extends to the pulp.
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external root resorption
involving
lateralor buccalthe
surface of the root of the
mandibular
central incisors which
appears as a sharply
defined
radiolucency confined to the
root surfaces.
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Idiopathic external
root resorption of the
mandibular tooth.
If resorption
continues,
it may result in
exfoliation of the tooth
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Secondary or reparative dentin is present in the restored molar
successful pulpas a result of
capping treatment.
The secondary dentin
) hasradiopaque(
occurred between the
lining of calcium
hydroxide (radiolucent)
and the pulp chamber.
Secondary dentin
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Pulp stones
Pulp stones
(denticles) in the pulp
chambers of the first
and second molars.
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Thank you