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Dentin

 September 13, 2013 |  admin |  Lecture series, Faculty Development Program Series
Questions
Answers
In predentin area, the area occupied by peritubular
dentin is
About 3%
“Translucent dentin” is often butterfly
shapped owing to
Convergence of dentinal tubules pulpally
“Translucent dentin” occurs when dentinal
tubule infilled
At root apex from cementum extend cervically and towards
root apex.  Direction is towards cervically.
Dentinal lymph has higher concentration of
Higher concentration of potassium ions and lower
concentration of sodium ions.
“Aspiration” of odontoblastic nuclei occur
With releasing of compression of tooth, the nuclei is
taken in to the tubule
From the pulp to DEJ, the mineral content of dentin,
hardness and elastic modolous
Decreases
From the pulp to DEJ, thickness of mineral crystals
Increases
The intermediate dentin is
A layer between predentin and mineralized dentin
Major difference between the mantle dentin and
circumpulpal dentin are
Mantle dentin is relatively less mineralized; collagen
fiber are perpendicular to enamel; branched dentinal tubule; presence of
mineralization by matrix mineralization
Mineral in dentin is deposited as
Globules or calcospherites

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