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Tooth > PDL > Flashcards

PDL Flashcards

1
Q

What does the PDL link

A

links cementum to alveolar bone to root

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2
Q

Blood supply of PDL

A

apical vessels
alveolar bone
gingival vessels

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3
Q

What are the 2 receptors in PDL and what do they record

A

nociceptors
mechanoreceptors
pain, touch + pressure

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4
Q

Most essential fibers in the PDL

A

Collagen type I, II and V

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5
Q

What fibers extend through the PDL

A

Principal fibers

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6
Q

What fibers are at the end of the PDL

A

Sharpey fibers

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7
Q

What does proteoglycans do

A

‘glue’ hold the tissue together

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8
Q

Connective tissue matrix (Principal Fibers) are divided into 4 groups

A
  1. Alveolar crest fibers (ACF)
  2. Horizontal fibers (HF)
  3. Oblique fibers (OF) MOST PRESENT
  4. Apical fibers (AF)
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9
Q

What do Sharpey fibers link the PDL to

A

connecting cementum to alveolar bone

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10
Q

What type of joint is the PDL

A

gomphosis (fibrous)

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11
Q

3 functions of PDL

A

Adsorption of occlusal forces
Neuromuscular
Remodelling

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12
Q

What does the PDL grow with

A

as tooth erupts and root grows

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13
Q

As …….. grows ……. towards the ……. the PDL is being formed

A

HERS
downwards
apex

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14
Q

What is the PDL derived from

A

dental follicle

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15
Q

Clinically what is PDL important for

A

mobility
occlusal loading
orthodontics
periodontal disease

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16
Q

The PDL can undergo adaptive changes in mobility in response to changes in:

A

damage to PDL
Thickness of overlaying bone (thin less support, thick more support)
if bone is lost tooth drifts

17
Q

Mobility due to overloading causes the PDL:
(high contact point)
Overeruption reduces overloading causes the PDL:

A

Thicker + bone resorption

PDL decreases, narrower PDL

18
Q

In orthodontics what occurs

A

orthodontic force
bone remodelling of the PDL + alveolar bone
new PDL is formed

19
Q

What occurs in the PDL in periodontitis

A

lost and cannot regrow

Tooth (11 decks)

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