Periodontal Ligament Flashcards Preview

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Flashcards in Periodontal Ligament Deck (47)
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1

Periodontal ligament is what type of articulation/joint?

Syndesmosis

2

What part of root is the PDL thinnest?

Midroot

3

Dental tissue which serves as shock absorber?

PDL

4

A test used to detect inflammation in the periradicular tissues?

Percussion

5

2 sensations PDL can register?

  • Pain
  • Pressure

6

True or false. Periodontal ligament can undergo remodelling?

True

7

Functions of PDL? (4)

  1. supportive
  2. sensory
  3. homeostasis
  4. nutritive

8

Cells of the PDL? (4)

  • fibroblast
  • cemento/osteoprogenitor cells
  • epithelial rest of malassez
  • undifferentiated cells/progenitor cells

9

Principal cells of PDL?

Fibroblasts

10

Has the highest rate or collagen turnover?

Fibroblast

11

Cell esponsible for both synthesis and dgradation of collagen?

Fibroblast

12

Provides strong mechanical attachments between adjacent cells?

Adherens

13

Specialized focal contacts in ECM formed by the fibroblast?

Fibronexus

14

Concavities where cementoclast/osteoclast are located?

Howship's lacunae

15

True or false. Epithelial rests of Malassez are continuously released?

True

16

Secreted by the epithelial rest of malassez which regulates PDL?

Epithelial growth factor

17

Cells of the PDL located around the blood vessels?

Unmyelinated/progenitor cells

18

3 connective tissue fibers of the PDL.

  • Collagen fibers
  • Oxytalan
  • Elaunin fiber

19

Type of collagen fibers predominant in PDL? (2)

  • Type 1
  • Type 3

20

Principal fiber bundles from cementum to bone?

Dentoalveolar fibers

21

Type of collagen fiber:

Resist vertical and intrusive forces? (2)

  • Alveolar crest
  • Oblique fibers

22

Type of collagen fiber:

Anchors the tooth to the alveolus?

Alveolar crest fibers

23

Type of collagen fiber:

Resist lateral pressure applied to tooth crown?

Horizontal fibers

24

Type of collagen fiber:

Prevents vestibulooral tipping?

Apical fibers

25

Type of collagen fiber:

Resist tipping and torque?

Interradicular fibers

26

True or false. Fiber insertions are wider in cementum than in bone side?

False. Wider in bone side

27

Increased functional load causes widening ot narrowing of the periodontal space?

Widening

28

Contents of the interstitial space?

  • Blood vessels
  • Nerves
  • Lymphatics
  • Interstitial tissue

29

Bundles of microfibrils?

Oxytalan

30

Acid resistant CT fibers?

Oxytalan