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Histology 2 > Tooth Histology > Flashcards

Tooth Histology Flashcards

1
Q

How to study enamel histologically

A
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2
Q

Enamel structure

Tightly packed…Crystals

A

Hydroxyapatite

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3
Q

What is this?

A

Enamel

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4
Q

Enamel Prism

Shape

Orientations

A

Complex “key hole” shape

From different orientations of the hydroxyapatite crystals

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5
Q

Gnarled Enamel

Where is it found?

A

Cusps of the tooth. Prisms twisted around each other for strength.

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6
Q

Striae of Retzius

What are they?

A

Incremental growth lines representing ~weekly growth

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7
Q

Perikymata

What is it?

A

A shallow furrow where the striae reach the surface

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8
Q

Dentine Collagen

What does it provide?

Runs in what orientation?

A

Strength to the dentine (like reinforced concrete)

Mainly parallel to ADJ

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9
Q

Dentinal Tubules

A
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10
Q

DentineTubules

A

Dentine is highly tubularTubules are continuous with pulp and may contain cell processes, nerves and fluid

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11
Q

Tubule Density

A
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12
Q

Tubule Curvatures

A
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13
Q

What can be in the dentinal tubules?

A
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14
Q

Nerves in Dentine

Summary

A

Dentine sparsely innervated with most in pre-dentine and inner dentine in pulp horns. Few at cervial margin which is clinically a sensitive area.

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15
Q

Dentine Classificaton

Primary Dentine

A

Formed during tooth development (up to root completion)

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16
Q

Tertiary Dentine

Localised

A

Under stimulus

17
Q

Types of Cementum

A
18
Q

Dental Pulp Gross Anatomy

A
19
Q

Pulp vs Connective Tissue

A
20
Q

Pulp in Dentine

A
21
Q

Enamel structure

Basic unit

A

Enamel prism (rod)

22
Q

Enamel structure

Prisms visible in…

A

Ground sections or SEM’s of acid etched enamel

23
Q

Dentine Classificaton

Secondary

A

Formed after root completion and forms slowly throughout the life of the tooth

24
Q

Dentine Classificaton

DentineTertiary Dentine

A

Response to pulpal insult

25
Q

Tertiary Dentine

Reactionary

A

Existing odontoblasts destroyed and newly differentiated ones are recruited.

26
Q

Tertiary Dentine

Reparative

A

Forms rapidly and has poor structure

27
Q

Tertiary Dentine

Function

A

Remove pulp from stimulus

Histology 2 (12 decks)

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