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OCB02 > OCB02-1021 Gingiva and Perimplant Tissues > Flashcards

OCB02-1021 Gingiva and Perimplant Tissues Flashcards

1
Q

What is the periodontium?

A

The supporting structures of the tooth

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2
Q

What makes up the peridontium?

A

Gingiva
Periodontal ligament
Cementum
Alveolar bone

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3
Q

What does the peri-implant structure?

A

Contains all supporting structures of the implant

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4
Q

What is not present in the peri-implant structure?

A

PDL

Cementum

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5
Q

Why is there no PDL or cementum?

A

The implant is in direct contact with the alveolar bone

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6
Q

What is the gingiva a part of?

A

Oral mucosa

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7
Q

What is the gingiva defined by?

A

The tooth and mucogingival junction

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8
Q

What is the main role of the gingiva?

A

for protection of the underlying tissue and holds back bacteria

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9
Q

What are the 3 areas of the gingiva?

A

attached gingiva, free gingiva and crevicular and junctional

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10
Q

What are the elements of the gingiva ?

A

Epithelial elements and connective tissue elements

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11
Q

What colour is attached and free gingiva?

A

Pale pink

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12
Q

What type of mucosa does attached gingiva have?

A

keratinised mucosa

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13
Q

What is the attached gingiva?

A

area from the mucogingival junction to the free gingival groove

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14
Q

What epithelium does free gingiva have?

A

Keratinised epithelium which is slightly loose and smooth

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15
Q

What is the free gingival area?

A

From the free gingival groove to tooth

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16
Q

What does he shape of the interdental gingiva depend on?

A

Shape and size of the tooth

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17
Q

What occurs to the papilla when teeth are narrower from buccal to lingual?

A

The papilla comes narrower

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18
Q

What shape does papilla become in anterior teeth?

A

Pyramidal

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19
Q

What shape is the papilla in wider teeth?

A

Tent shape

20
Q

What is the dental papilla called?

A

COL

21
Q

How thick is the gingival epithelium?

A

0.2-0.3mm

22
Q

What are the four layers of the gingival epithelium?

A

Stratum Basale
Stratum spinosum
Stratum Granulosum
Stratum Corneum

23
Q

What type of keratinisation are gingival tissues?

A

All orthokeratinised but there can be parakeratinised or incomplete areas if keratinisation

24
Q

What are the cells of the gingival epithelium?

A

Melanocytes
Langerhans cells
Merkel cells
T cells

25
Q

Where are langerhan cells mainly present?

A

In the coronal part of the junction epithelium

26
Q

What happens to the junctional epithelium as you go further into the gingiva?

A

It becomes non-keratinised and contains basal and suprabasal cells

27
Q

What happens as a result of new cells never becoming keratinsed?

A

Forms large intercellular spaces which are permeable to chemicals

28
Q

How is epithelium attached?

A

Hemidesmosomes

29
Q

How often is the junctional epithelium replaced?

A

4-6 days

30
Q

How thick does the junctional epithelium start off?

A

30 cells thick

31
Q

What happens when an inflamed junctional epithelium is probed?

A

The probe will go down further through the junctional epithelium and into the connective tissue
It will bleed

32
Q

How does the titanium implant stay in?

A

The body makes hemidesmosomes which stick to titanium and junctional epithelium grows around the implant

33
Q

Which materials do not easily have a junctional epithelium attached to them?

A

Gold or ceramic plates

34
Q

What is epithelial down growth of junctional epithelium prevented by?

A

Connective tissue under the gingiva, as it sends signals to the junctional epithelium to prevent it from growing further

35
Q

What maintains the gingival connective tissue’s tissue consistency and fluid?

A

Glycosaminoglycans

36
Q

What is the purpose of collage fibres in gingival connective tissue?

A

prevents the gums from moving around the teeth when we eat

37
Q

Where do dent-gingival fibres go from?

A

from Dentine to gingiva

38
Q

Where do alveolar crest fibres go from?

A

come from alveolar crest and attach to the gingiva

39
Q

Where do dentoalveolar fibres go from?

A

from alveolar bone and attach to dentine

40
Q

Where are circular fibres?

A

Spread all the way round in the gingiva

41
Q

What occurs during gum disease?

A

gingival connective tissue breaks down

42
Q

Which fibres are not present in clinically healthy tissue surrounding implants?

A

Dentogingival

43
Q

What is the inner zone of implant gingiva in contact with?

A

With the implant surface

44
Q

What is the outer zone of implant gingiva in contact with?

A

between bone and epithelium

45
Q

What is the difference between inner and outer son of implant gingiva?

A

Inner has more collagen the outer

Outer has more cells and blood vessels

OCB02 (18 decks)

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