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Histology > Dentin > Flashcards

Dentin Flashcards

1
Q

Calcium Hydroxyapatite %

A

Enamel > Dentin > Cementum (bone)

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2
Q

Radiolucent - Radiopaque

A

[dark] pulp - cementum - dentin - enamel [light]

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3
Q

Dentinogenesis

A

Dentin formation

  • during apposition stage of TD
  • growth throughout life of tooth
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4
Q

Predentin

A

Mesenchymal product

Odontoblasts -> type 1 collagen + phosphoprotien (acidic, attracts calcium)

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5
Q

Primary Dentogenesis

A

Calcospherules
Expansion + Fusion
Interglobular dentin

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6
Q

Secondary Dentinogenesis

A

Layered mineralization

Globular dentin

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7
Q

Interglobular Dentin

A

Not completely fused, less mineralized

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8
Q

Dentinal Tubules: contents

A

Dentinal fluid, afferent nerve axon

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9
Q

Dentinal Tubules: where

A

(thin) DEJ/CEJ - outer pulp wall (thick)

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10
Q

Dentinal Tubules: curvature

A 
Primary = S-shape, over time 
Secondary = small, daily changes
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11
Q

Peritubular Dentin

A

In tubal walls

Highly mineralized

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12
Q

Interrubular Dentin

A

Between tubuals

Highly mineralized

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13
Q

Mantle Dentin

A

Outermost near DEJ

First formed

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14
Q

Circumpulpal Dentin

A

Around pulpal wall

Second formed

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15
Q

Primary Dentin

A

B4 apical foreman

More mineralized than secondary

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16
Q

Secondary Dentin

A

After apical foramen

Less mineralized than primary

17
Q

Tertiary Dentin

A

Injury

Irregular

18
Q

Sclerotic Dentin

A

Type of tertiary
Chronic injury, caries, attrition, abrasion, age
Odontoblastic peocesses die,
tubuals vacant

19
Q

Smear Layer

A

When dentin is cut

Biofilm

20
Q

Dentinal Hypersensitivity

A

When dentin is exposed

21
Q

Imbrication lines of von Ebner

A

Incremental
“Tree rings”
(dentin)

22
Q

Contour lines of Owen

A

Specific lines from disturbance

dentin

23
Q

Tomes Granular Layer

A

@ DEJ

Less mineralized

24
Q

Aging Dentin

A

Tubuals narrow
Reduced organelles
Less sensitivity

Histology (8 decks)

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