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ORAL HISTO > DENTIN BOOK > Flashcards

DENTIN BOOK Flashcards

0
Q

Arises during the initial phase of dentinogenesis

A

Mantle dentin

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1
Q

Outer thin layer of dentin
INITIAL DENTIN FORMED
150mm thick
running parallel with dej

A

Mantle dentin

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2
Q

Consists of thick collagen alpha fibrils

A

Mantle dentin

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3
Q

Surrounds the pulp

A

Circumpulpal dentin

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4
Q

Bulk of dentin mass between mantle and pulpal space

A

Circumpulpal dentin

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5
Q

Consists of beta fibrils

A

Circumpulpal dentin

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6
Q

Represents the continuing but much slower deposition of dentin by odontoblasts AFTER ROOT FORMATION has been completed

A

Secondary dentin

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7
Q

Changes in pulp space

A

Pulp recession

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8
Q

Changes from primary to secondary marked by abrupt changes in tubular pattern. This line of directional change is called

A

Schregers line

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9
Q

Result of defensive activitiesof the pulp dentin complex

A

Tertiary dentin

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10
Q

Dentin may have vascular inclusion

A

Vasodentin

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11
Q

Dentin may appear similar to bone

A

Osteodentin

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12
Q

Tertiary dentin is only found in the

A

Dentin pulp interface

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13
Q

Unmineralized dentin matrix that lines INNERMOST portion of dentin

A

Predentin

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14
Q

Impt in maintaining the integrity of dentin bec when absent dentin is vulnerable to RESORPTION BY ODONTOClast

A

Predentin

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15
Q

Formed in vital teeth throughout life

A

Peritubular or intratubular

16
Q

Dentinal matrix that COVERS WALLS, VERY DENSE

A

intratubular

17
Q

Loc bet dentinal tubules
Main bulk of dentinal matl
Less dense, less radiopaque

A

Intertubular

18
Q

Represents primary secretory product of odontoblasts and consists large amt of type 1 collagen

A

Intertubular dentin

19
Q

Regularly arranged canals that extend from tooth pulp to dej and to dcj

A

Dentinal tubules

20
Q

Direction of dentinal tubules at
Incisal:
Proximal:

A

I: straight
P: s shaped

21
Q

Primary curvatures directed

Secondary directed

A

1: coronally
2: apically

22
Q

Tubules that extend upto enamel

A

Enamel spindles

23
Q

Contains dentinal fluid! Collagen fibrils, peritubular dentinmatrix.
Plays a role in the PHYSIOLOGIC MAINTENANCE OF DENTIN

A

Periodontiblastic space

24
Q

Dentin is not uniformly sensitive

More sensitive at the

A

Dej and pulp

25
Q

Area of structural defect where hypomineralized dentin result from failure of globules of calcospherites to fuse

A

Interglobular dentin

26
Q

Black granules

A

Granular layer of tomes

27
Q

Due to the COALESCING and LOOPING of the terminal portions of the dentinal tubules

A

Granular layer of tomes

28
Q

Appositional growth of dentin

A

Incremental lines of von ebner

29
Q

Is the phasic or increment of dentin formation at a daily rate of 4mm

A

Incremental lines of von ebner

30
Q

Result in ACCENTUATION of the growth lines in dentin

A

Contour lines of owen

31
Q

Morphological change in dentin includes thickening of the peritubular dentin and complete obliteration of dentinal tubules

A

Sclerotic dentin or transparent dentin

32
Q

Exhibit a set of short cytoplasmic processes on their distal poles

A

Preodontoblast

33
Q

Fibroblasts of dental papilla

A

Korffs fibers or alpha

34
Q

Excellent thermal conductors

Approp to place a LOW CONDUCTING CEMENT BASE

A

Metallic restorations

35
Q

Permeability of dentin

A

Effective sealing

36
Q

Depemds on presence of LIVE ODONTOBLASTS

A

Vitality of dentin

ORAL HISTO (11 decks)

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