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Laura’s Histology > Cementum > Flashcards

Cementum Flashcards

1
Q

Cementoblasts

A
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2
Q

Two types of cementum

A

Cellular and acellular

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3
Q

Primary cementum is what sort of cementum

A

Acellular
No cells

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4
Q

Where is acellular cementum located

A

Adjacent to dentine, on the laterals

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5
Q

Dark blobs in where is cellular cementum located

A

apical part of the root
Furcation

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6
Q

What is the function of cementum

A

Cover the root dentine
Attach the tooth via the PDL to alveolar bone

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7
Q

Can you find both cellular and acellular cementum in the same region?

A

Yes. Acellular is closer to the tooth, inside because it’s primary cementum

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8
Q

Primary vs secondary cementum

A

Primary formed first

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9
Q

Name of the collagen fibres from periodontal ligament in the acellular cementum

A

Sharpey’s fibres

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10
Q

What is the function of acellular extrinsic fibre cementum

A

Attachment of tooth to bone
Present on cervical 2/3 of roots

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11
Q

Name the cementum with no sharpey’s fibres

A

Cellular intrinsic fibre cementum

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12
Q

What’s the name of the cementum with no sharpey’s fibres

A

Cellular intrinsic fibre cementum

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13
Q

What is the special characteristics of CIFC?

A

No sharpey’s fibres
NO involvement in attachment on tooth to bone
Intrinsic collagen fibres run PARALLEL to surface

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14
Q

Histological classification of cementum

A

Connective tissue (mineralised with calcium)

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15
Q

Does cementum have blood vessels and nerves

A

No. Receive blood supply from adjacent PDL

The structure of cementum is similar to the compact bone. Both are composed of cells and mineralized extracellular matrix. But unlike bone, there are no Haversian canals, blood vessels, and nerves in the cementum.

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16
Q

Where is cementum the thickest

A

Thickest at root apex and thinnest cervically

17
Q

Where are cementocytes located

A

In lacunae in the cellular cementum

18
Q

Cementum is important because it can
Choose

A reinforce the weak dentine
B compensate tooth wear by growing
C shrink and compensate excessive dentinal growth

A

B

19
Q

Why is cementum more resistant to resorption that bone and also insensitive to pain?

A

Lack of vascularity and nerves

20
Q

Is there collagen in cementum

A

Yes.

Collagen fibres from PDL (sharpey’s fibres) in acellular extrinsic fibre cementum .

Intrinsic collagen fibres parallel to surface in cellular intrinsic fibre cementum

Laura’s Histology (12 decks)

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