Odontogenesis Flashcards

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1
Q

What is the definition of histogenesis?

A

differentiation of undifferentiated cells to make new tissues

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2
Q

What are the stages of odontogenesis

A
  • initiation stage
  • bud stage
  • cap stage
  • bell stage
  • crown stage/late bell stage
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3
Q

What week is the first sign of tooth development?

A

week 6

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4
Q

In the 6th week, what do signs of tooth development are there?

A

We get a condensation of mesenchyme in response to FGF8
The primary epithelial band starts to grow inwards towards this condensation of mesenchyme

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5
Q

in relation to tooth development, what happens in the 7th week?

A

The primary epithelial band differentiates into the dental lamina and the vestibular lamina
the dental lamina interacts with the mesenchyme
the vestibular lamina pushes down into the mesenchyme and is proliferating

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6
Q

in relation to tooth development what do we get in the 8th week?

A

The vestibular lamina is continuing to proliferate downwards
The dental lamina has formed the dental bud

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7
Q

In relation to tooth development what do we get in the 9th week?

A

signals have told the cells of the vestibular lamina to die off

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8
Q

which tissue initiates tooth development

A

epithelium initially has the odontogenic potential, then the ectomesenchyme

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9
Q

What tooth structures do the epithelium (ectoderm) give rise to?

A

enamel
hyaline layer of the root

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10
Q

What tooth structures does the mesenchyme (ectomesenchyme) give rise to?

A

dentine
pulp
cementum
periodontium - PDL and bone

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11
Q
A
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