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Perio > 1. Clinical morphology of the periodontium > Flashcards

1. Clinical morphology of the periodontium Flashcards

(36 cards)

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1
Q

Components of periodontium

A
  • Gingiva
  • Periodontal ligament
  • Cementum
  • Alveolar bone(Alveolar bone proper/bundle bone and alveolar process
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2
Q

Function of periodontium

A
  • Attach teeth to bone
  • Maintain integrity of mucosa in oral cavity
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3
Q

Types of mucosa

A
  • Masticatory mucosa
  • Specialised mucosa
  • Lining mucosa
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4
Q

Masticatory mucosa covers

A

Gingiva and hard palate

Is keratinised

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5
Q

Specialised mucosa covers

A

Dorsum of tongue

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6
Q

Lining mucosa covers

A
  • Soft palate
  • Inside of lips
  • Floor of mouth
  • Vestibulum
  • Ventral surface of tongue
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7
Q

Gingiva macroscopic anatomy

A
  • Covers alveolar process and surrounds tooth cervices
  • Consists of lamina propria-epithelial layer and underlying connective tissue
  • Free or attached
  • Keratinised-orange peel texture
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8
Q

Microscopic anatomy of gingiva-types of epithelium

A
  • Oral epithelium
  • Oral sulcular epithelium
  • Junctional epithelium
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9
Q

Epithelium that faces the oral cavity

A

Oral epithelium

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10
Q

Epithelium that faces the tooth without being in contact

A

Oral sulcular epithelium

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11
Q

The epithelium that is in contact with the tooth

A

Junctional epithelium

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12
Q

Connective tissue portions that project into epithelium

A

Connective tissue papilla

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13
Q

Oral epithelium characteristics

A
  • Keratinised
  • Stratified
  • Squamous epithelium
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14
Q

Oral epithelium cell layers

A
  1. Stratum basale(cuboidal cells)
  2. Stratum spinosum(thickest layer)
  3. Stratum granulosum
  4. Stratum corneum(keratinised)
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15
Q

Cells found in epithelium

A
  • Keratinocytes
  • Melanocytes
  • Immune cells
  • Inflammatory cells
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16
Q

Connective tissue fibres are produced by

17
Q

Types of connective tissue fibres

Study These Flashcards
A
  • Collagen fibres
  • Reticulin fibres
  • Oxytalan fibres
  • Elastic fibres
18
Q

Collagen fibres are arranged according to

Study These Flashcards
A

Insertion and course

19
Q

Types of collagen fibres

Study These Flashcards
A
  • Circular fibres
  • Dento-gingival fibres
  • Dento-periosteal fibres
  • Transeptal fibres
20
Q

Circular fibres(CF) characteristics

Study These Flashcards
A
  • In free gingiva
  • Encircle tooth like ring
21
Q

Dento-gingival fibres (DGF) characteristics

Study These Flashcards
A
  • Embedded in cementum of supra-alveolar portion of root
  • Project from cementum in fan like configuration into free gingival tissue
22
Q

Dento-periosteal fibres (DPF) Characteristics

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A
  • Embedded in same portion of cementum as dento-gingival fibres
  • Fibres run more apically over vestibular and lingual bone crest
  • Terminate in tissue of attached gingiva
23
Q

Free gingival groove charactertics

Study These Flashcards
A
  • Border between free and attached gingiva
  • Epithelium lacks support by underlying collagen fibre bundles
24
Q

Transeptal fibres characteristics

Study These Flashcards
A
  • Extend between supra-alveolar cementum of adjacent teeth
  • Run across interdental septum
  • Embedded in cementum of adjacent teeth
25
Periodontal ligament characteristics
* Richly vascular and cellular connective tissue * Surrounds roots of teeth * Joins cementum w/ alveolar bone(bundle bone)
26
Periodontal ligament fibres
*Alveolar crest fibers(ACF) * Horizontal fibres(HF) * Oblique fibres(OF) * Apical fibres(AF)
27
Cementum characteristics
* Specialised mineral tissue * Covers root surface and small portions of crown * Contains collagen fibres and organic matrix * 65% mineral-hydroxyapetite
28
Types of cementum
* **Acellular**-**extrinsic** **fibre** cementum * **Cellular** **mixed** **stratified** cementum * **Cellular** **intrinsic** **fibre** cementum
29
Acellular extrinsic fibre cementum characteristics
* In coronal and middle part of root * Main sharpeys fibres * Connects tooth w/ bundle bone
30
Cellular mixed stratified cementum characteristics
* In apical third of root and furcations * Contains extrinsic, intrinsic fibres and cementocytes
31
Cellular intrinsic fibre cementum
* In resorption lacunae * Intrinsic fibres and cementocytes
32
Alveolar bone characteristics
* Supports the teeth * Formed from dental lamina * Distributes and absorbs masticatory forces
33
Alveolar process anatomy
* External plate of cortical bone * Inner socket wall of thin compact bone=alveolar bone proper/bundle bone * Cancellous trabecular bone between the two layers
34
Bone coverage misssing a coronal portion of roots
Dihescence
35
Bone present coronally and apically of a defect
Fenestration
35
Socket wall is formed by
Bundle bone

Perio (62 decks)

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