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ORAL HISTO > DENTINOGENESIS > Flashcards

DENTINOGENESIS Flashcards

0
Q

Process of dentin formation

A

Dentinogenesis

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1
Q

Stage where is dentin is deposited

A

Late bell stage

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2
Q

Formative cells of dentin

A

Odontoblasts

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3
Q

Formative organ

A

Dental papilla

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4
Q

Embryonic origin of dentin

A

Ectomesenchyme

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5
Q

Terminal bar apparatus is formed at the

A

DISTAL POLE OF PRE ODONTOBLASTS

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6
Q

First sign of dentin formation is the appearance of large diameter collagen fibers called

A

Von korff’s fibers

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7
Q

Deposition of crystals in several distinct areas of matrix-calcospherites

A

Globular mineralization

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8
Q

Globular mineralization occurs un the

A

Globular fascia

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9
Q

Globular masses enlarge and fuse to form a SINGLE CALCIFIED MASS

A

Globular mineralization

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10
Q

Reason why dentin is sensitive

A

Enamel spindle

Intratubular nerve

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11
Q

One of the most unusual feature of the dentin pulp complex

A

Dentin sensitivity

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12
Q

Overwhelming sensation perceived by dentin pulp complex is

A

Pain

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13
Q

Dentin is more sensitive along

A

Dej and near pulp

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14
Q

Stimuli: sentivitity of dentin

A

Air water spray
Contact w a bur or probe
Dehydration

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15
Q

Theories in dentin sensitivity

A

Direct conduction
Transduction
Hydrodynamic

16
Q

Theory:
Dentin is DIRECTLY INNERVATED bec of intratubular nerve is inside the den tubule.
Limitation: SOME TUBULES DONT HAVE NERVE

A

direct conduction

17
Q

Theory:
Odontoblasts act as RECEPTOR
It would transmit to the receptors in the pulp proceed to brain and perceived as PAIN

A

Transduction

18
Q

Theory:
Fluid movt through the tubules stimulates receptors in the pulp

Disturbance on surface of dentin gets propagated down in the pulp>brain>pain

A

Hydrodynamic theory

19
Q

Receptors found in PULP

A

Transduction

Hydrodynamic

20
Q

Receptors found inside the dentinal tubule

A

Direct conduction theory

21
Q

How does dentin HYPERSENSITIVITY occur?

A

It occurs when DENTIN becomes EXPOSED and TUBULES are OPEN at the dentinsurface

22
Q

2 treatment approaches

A
  1. Interrupt the neural response to pain stimuli

2. Occlude OPEN TUBULES to block the hydrodynamic mechanism

23
Q

Disturbance of matrix formation and dentin mineralization

A

Dentinogenesis imperfecta

24
Q

Abnormally translucent enamel

A

Dentinogenesis imperfecta

25
Q

Placement of a Calcium hydroxide liner on DENTIN for DEEP CAVITIES

A

Indirect pulp capping

26
Q

Calcium hydroxide DIRECTLY on PULP

A

Direct pulp capping

27
Q

By product of microorg in dentinal tubules

A

Acid —- CARIESSSSS

ORAL HISTO (11 decks)

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