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KINES 3080: Dental School Prep > Development of Enamel > Flashcards

Development of Enamel Flashcards

1
Q

What causes the organelles to move to the opposite end of each preameloblast?

A

A polarity change

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2
Q

Why does a polarity change occur in preameloblasts?

A

Isolation from nutrients

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3
Q

What happens when a polarity change occurs in preameloblasts?

A
  • Organelles move to the opposite end of each cell

- Preameloblasts are now called ameloblasts

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4
Q

What are ameloblasts?

A

Enamel forming cells

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5
Q

Where do ameloblasts arise from?

A

The oral ectoderm

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6
Q

What are enamel-forming cells called?

A

Ameloblasts

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7
Q

When the ameloblasts begin to lay down an enamel matrix, what is formed?

A

DEJ

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8
Q

When is the DEJ formed?

A

When ameloblasts begin to lay down an enamel matrix

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9
Q

When an enamel matrix is laid down, what structure is formed?

A

DEJ

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10
Q

What do ameloblasts do during calcification?

A

Travel to the surface depositing crystals onto the matrix

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11
Q

Which cells deposit crystals onto the enamel matrix during calcification?

A

Ameloblasts

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12
Q

Calcification, aka

A

Deposition

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13
Q

What do ameloblasts lay down at the end of the bell stage?

A

An inorganic/organic matrix

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14
Q

When do ameloblasts lay down an inorganic/organic matrix?

A

At the end of the bell stage

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15
Q

What are the two stages of calcification?

A

Mineralization Stage

Maturation Stage

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16
Q

What is the Mineralization Stage?

A

One stage of calcification, all crystals have been laid down and will never increase in number

17
Q

What is the Maturation Stage?

A

One stage of calcification, crystals grow and become tightly packed against one another

18
Q

What happens to the stratum intermedium and stellate reticulum?

A

Broken down by ameloblasts as ameloblasts approach the surface

19
Q

When do ameloblasts stop making enamel?

A

When they meet the OEE cells

20
Q

What happens when the ameloblasts meet the OEE cells?

A

They stop making enamel

21
Q

What is Nasmyth’s Membrane?

A

Protective layer over the enamel, laid down by ameloblasts

22
Q

When is Nasmyth’s Membrane produced?

A

After ameloblasts meet the OEE cells and have stopped making enamel

23
Q

What is the Reduced Enamel Epithelium?

A

Layer formed by ameloblasts flattening out and blending with OEE cells

24
Q

Ameloblasts flatten out and blend with OEE cells to form what?

A

Reduced Enamel Epithelium

25
Q

What is the function of Reduced Enamel Epithelium?

A

Secrete glue called epithelial attachment that holds gingiva to the tooth

26
Q

What is epithelial attachment?

A

Secretion of the REE that holds gingiva to the tooth

27
Q

What eventually happens to REE?

A

It is worn away naturally

KINES 3080: Dental School Prep (54 decks)

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