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Oral Biology > Periodontum > Flashcards

Periodontum Flashcards

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1
Q

Label the periodontal Tissues here

A
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2
Q

What are the 5 periodontal tissues?

A

-Cementum
-Alveolar Bone
-Tooth
-Gingiva
-Periodontal Ligament

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3
Q

what is the periodontal ligament and what does it contain?

A

A connective tissue containing;

-Cells
-Extracellular matrix
-Fibres
-Nerves
-Blood Vessels

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4
Q

What are the features of the periodontal ligament matrix?

A

-Hyaluronate glycosaminoglycans
-Proteoglycans- sugar with protein attached to side chain
-Glycoproteins- Protein with sugar attached to side chain

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5
Q

What is a property of periodontal ligament matrix?

A
  • Behaves as viscous elastic gel
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6
Q

What are the cells of the periodontal Ligament?

A

-Fibroblasts
-Cementoblasts
-Osteoclasts and cementoclasts
-Epithelial Cells- cell rests (or debris) of Malassez
-Defence Cells

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7
Q

PDL Nerves

Give sensory receptors of PDL

A

-Mechanoreceptors
-Nociceptors

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8
Q

PDL Nerves

Give autonomic (sympathetic) PDL Nerve controls

A

-Blood vessels control
-Vasoconstriction

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9
Q

Give 2 types of periodontal fibres

A

-True periodontal Ligament fibres
-Gingival Ligament fibres

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10
Q

What are the true periodontal Ligament Fibres

A

Fibres connecting tooth to bone at or apical to alveolar crest

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11
Q

What are gingival ligament fibres

A

Fibres mainly above the alveolar crest, including ‘free gingival’ fibres

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12
Q

What does the periodontal ligament attach?

A

Tooth to jaw

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13
Q

What does the periodontal ligament transmit?

A

Biting forces to alveolar bone

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14
Q

What tissue makes up the periodontal Ligament?

A

Organised (regular) connective tissue

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15
Q

What is the width of the PDL?

A

Approx 0.2mm

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16
Q

What are the PDL principal fibre groups of the alveoli dental ligament and their function?

A

-Alveolar crest -limits lateral movement and rotation
-Horizontal- side to side force during mastication
-Oblique- stretch and transfer force
-Apical- coil
-Inter- radicular (multicoated teeth)

17
Q

What are the ppl principle fibre groups of the inter-dental ligament

A

-Trans-septal fibres
-Interdental Septum

18
Q

Label this diagram of periodontal ligament fibre groups

A
19
Q

Label this diagram of interdental Ligament fibres

A
20
Q

What is periodontal ligament loading?

A

Application of brief force

Oral Biology (2 decks)

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