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Introduction to Dentistry > Quiz > Flashcards

Quiz Flashcards

1
Q

What is the function of teeth? (4)

A

Mastication, appearance, support, speech

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2
Q

Which has the highest mineral content?
Enamel
Dentine
Cementum

A

Enamel

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3
Q

Which is the hardest?
Enamel
Dentine
Cementum

A

Enamel

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4
Q

Which is the toughest?
Enamel
Dentine
Cementum

A

Cementum

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5
Q

From what cells does enamel form?

A

Ameloblasts

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6
Q

From what cells does dentine form?

A

Odontoblasts

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7
Q

From what cells does cementum form?

A

Cementoblasts

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8
Q

Is enamel a living tissue?

A

No

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9
Q

What problems to occlusal fissures pose?

A

Toothbrush cannot reach the deep fissure so it a prime site for caries

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10
Q

How are occlusal fissure treated?

A

Applying a fissure sealant

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11
Q

Where does enamel grow from?

A

The enamel dentine junction from amelobalsts

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12
Q

How is enamel structured?

A

Crystalline structure

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13
Q

What is pre-dentine?

A

Newly formed band of dentine found at the plural border, it is unmineralised.

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14
Q

What is primary dentine?

A

Dentine formed before the completion of the root formation

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15
Q

What is secondary dentine?

A

Dentine formed after the completion of the root formation

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16
Q

What is tertiary dentine?

A

Dentine formed in response to an external stimuli

17
Q

What is reactionary dentine?

A

Tertiary dentine formed from original odontoblast (weak injury)

18
Q

What is reparative dentine?

A

Tertiary dentine formed from new odontoblasts after severe injury

19
Q

What is pulp made of?

A

Collagen

20
Q

What runs through the pulp and where do they enter?

A

Blood vessels and nerves

Through apical foramen

21
Q

What cells does the pulp contain?

A

Mainly fibroblasts, some odontoblasts

22
Q

What are pulp stones?

A

Calcified masses that appear in the pulp of damaged or aged teeth

23
Q

What is the general term for teeth supporting structures?

A

Periodontium

24
Q

What are the 4 tooth supporting structures?

A

Gingiva, cementum, alveolar bone and periodontal ligaments

25
Q

What are the 2 types of gingiva and where are they found?

A

Free gingiva - movable - found from the gingival margin to the gingival sulcus
Attached gingiva - attached to the bone

26
Q

What is the junctional epithelium and why is it leaky?

A

It attaches the gingiva to the enamel.

It is leaky to allow fluid containing immune cells through

27
Q

Why is healthy gingiva paler than unhealthy gingiva?

A

Healthy gingiva contains more keratin to protect it against abrasion during mastication

28
Q

What is the periodontal ligament made out of?

A

Collagen fibres

When these are found in the cementum and bone they are known as Sharpay fibres

29
Q

What is the function of the periodontal ligament?

A

Resists intrusion of the teeth during mastication

30
Q

What cells does the periodontal ligament contain and what are their functions?

A

Osteoblasts form bone
Cementoblasts secrete cementum
Fibroblasts secrete collagen

31
Q

How is the periodontal ligament adapted for its function?

A

High cell turnover
Good vascular supply (so it can heal quickly)
Good innervation (so it can respond to pain)

32
Q

What are the 2 different types fo cementum and where are they found?

A

Acellular - around the root

Cellular - around the apex

33
Q

What happens to surrounding alveolar bone if a tooth is removed?

A

It is resorbed by osteoclasts

34
Q

What is the Neo-natal line?

A

A line formed in the tooth at birth to show what dentine was made before and after birth

35
Q

What is the difference between enamel thickness and EDJ scalloping in primary and permanent mention?

A

Permanent dentition has a thicker enamel and a more scalloped EDJ

36
Q

What is the main organic component of dentine?

A

Collagen

37
Q

Why are dentine and enamel harder than bone?

A

Higher mineral content

38
Q

Is cementum vascular?

A

Yes

Introduction to Dentistry (4 decks)

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