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Chiego Ch. 8 Dentin

Terms in this set (18)

_________ is softer than enamel.
dentin (70% compared to 96%)
Tertiary dentin is
reparative, reactionary/response to trauma.
Primary dentin is
dentin formed before root formation
Secondary dentin is
produced after the root of the tooth is completely formed
Which is the first dentin formed?
mantle dentin
Globular dentin separates _____________ from ______________.
mantle dentin, circumpulpal dentin
Circumpulpal dentin is formed
prior to tooth function
What is circumpulpal dentin?
major component of the crown and root of the tooth
What dentin borders the pulp?
predentin
Predentin forms in?
2 stages
What is the major organic component of dentin?
collagen
Predentin is laid down first by the odontoblasts in layers of nonmineralized __________________.
collagen fibers
globular dentin is
lighter areas of complete crystalline fusion
interglobular dentin
darker areas where only primary mineralization has occurred (less mineralized)
peritubular/intratubular dentin
hypermineralized collar of dentin that surrounds the dentinal tubules
imbrication lines of von Ebner
found in mature dentin. Growth rings or incremental lines of dentin apposition due to varying orientations of the collagen fibers
Tomes' granular layer
less mineralized layer adjacent to the cementum (DCJ) and in the dentin of the root. May result in sensitivity if recession is present
Predentin is mineralized in _________ hours to dentin
24
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