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Anatomy final > Teeth & Mastication > Flashcards

Teeth & Mastication Flashcards

1
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2
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3
Q

What’s Cementum?

A

‘Glue’ that links root dentine and periodontal ligament

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4
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Mouth anatomical directions?

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5
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6
Q

2 Things that happen to grow tooth?

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7
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Enamel knot

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8
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Dentine forming cells?

A

Odontoblasts

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9
Q

Enamel forming cells?

A

Ameloblasts

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10
Q

What’s Dentine made of?

A

Weave of collagen, ground substances and hydroxyapatite

70% Mineral

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11
Q

What does an odontoblast secrete?

A

A single dentine tubule

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12
Q

How is enamel made?

A

1) Ameloblasts secrete enamel matrix (mostly proteins/minerals)
2) Mineralization: Hydroxyapatite crystals grow & encompass matrix

96% Mineral

Each ameloblast creates a single enamel prism

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13
Q

How does Circadian Rhythm affect enamel?

A

Secretion pauses every day, creates lines and striations that can help determine how long it took animal to grow the tooth

(longer time often = larger brain)

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14
Q

Homodonty?

A

Having only 1 type of tooth (fish & early tetrapods)

Single-cusped teeth

Good at catching prey, but not for chewing

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15
Q

Heterodonty

A

Mammals

incisors

‣ canines
‣ premolars

‣ molars

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16
Q

Evolution of multicusped teeth?

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17
Q

Tribosphenic Molar

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18
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What is each human tooth specifically called?

A
19
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Properties of incisors

A

Single, blade-like cusp

Single root

20
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Properties of canines

A

Single, pointed cusp

Single root

21
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Properties of premolars

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2 cusps

Single root

22
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Properties of molars

A

4-5 cusps
2 or 3 roots

23
Q

What are postcanines good for in different animals?

A

Humans/apes: Grinding brittle foods

Cats, etc: Shearing/cutting ductile foods

24
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Diphyodonty

A

Having deciduous teeth before permanent teeth

25
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Odontoclasts

A

Absorb roots of deciduous teeth

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29
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TMJ movements

A

elevation/depression

protraction/retraction

medial-lateral shift (“Bennett shift”)

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31
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Masticatory Muscles & innervation

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32
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Medial-Lateral Movement

A

Requires the activation of the masseter on one side and the medial pterygoid on the other

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Anatomy final (7 decks)

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