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21 Cards in this Set
- Front
- Back
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What are dentinal tubules and where do they extend from? |
long tubes in the dentin that extend from the DEJ or DCJ to the outer wall of the pulp |
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Review: Where do the dentinal tubules extend from? |
The DEJ in the crown area or DCJ in the root area to the outer wall of the pulp |
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After apposition of predentin and maturation into dentin the cell bodies of the odonotoblast do what? |
Remain in the pulp inside the tooth, along its outer wall |
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Is dentin vascular or avascular |
Avascular |
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Nutrition from odontoblast within the dentin comes through what? |
Dentinal Tubules from tissue fluid that originally traveled from the blood vessels located in the adjacent pulp tissue |
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Within each dentinal tubule is a space of variable size containing what? |
dentinal fluid odontoblastic process possibly and Afferent axon |
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Dentinal fluid in the tubule presumably also includes what/ |
Tissue fluid surrounding the cell membrane of odontoblast |
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Review: Nutrition in the dentin comes from what? |
Tissue Fluid |
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What is the odontoblastic Process? |
a long cellular extension located within the dentinal tubule that is still attached to the cell body of the odontoblast within the pulp |
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TRUE or False An Afferent Axon is associated with part of the odontoblastic process in some dentinal tubules |
TRUE |
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The Afferent Axon is involved in what? |
Only the sensation of pain |
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What does the direction of the tubule reflect? |
The pathway of the odontoblast during apposition of predentin |
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How many types of curvature are there? |
2
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What are the two types of curvature called? |
Primary and secondary |
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What does the primary curvature reflect |
overall tubule course over time |
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What does the primary curvature resemble? |
A large S-shaped curve |
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The secondary curve reflects what? |
the smaller daily changes in odontoblast direction during apposition |
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The secondary curve of the tubule consist of what? |
small, delicate curves in the primary curve |
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Are dentinal tubules interrupted by the formation of the interglobular areas of dentin |
No they pass right through them |
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TRUE or False
Tubules can branch at any point along the way from the DEJ or DCJ to the pulp |
TRUE |
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Dentinal tubules are what near the pulp and because of why? |
Crowded Because of the narrowing of this region |
