Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Oral Biology > Oral Mucosa II > Flashcards

Oral Mucosa II Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What’s special about the lip in regards to epithelium/mucosa present?

A
  • Consists of skin, specialised mucosa transition zone (vermillion border) and labial oral mucosa (inner side)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Are striated muscles present in the lip?

A
  • YES

- Striated muscles of facial expression in the lip core

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Are Minor Salivary glands in the Submucosa?

A
  • YES

- Beneath the Oral Mucosa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the characteristics of the Lip skin?

A
  • Keratinised epidermis
  • CT dermis
  • Hair follicles
  • Sebaceous glands
  • Sweat
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the characteristics of the Vermilion Zone?

A
  • Lacks skin appendages
  • Occasional sebaceous glands (corner of the mouth)
  • No mucous glands (needs constant moistening)
  • Keratinised epithelium
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What’s the junction between the Vermilion zone and Oral Mucosa called?

A
  • Intermediate zone

- Parakeratinised

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the characteristics of the Labial Mucosa?

A
  • Covered in thick, non-keratinised epithelium
  • Lamina Propria is wide but the Papillae are short and irregular
  • Submucosa with minor salivary glands
  • Dense CT fibres bind the mucosa to the Orbicularis Oris muscle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The Cheek: What are its characteristics?

A
  • Non-keratinised epithelium
  • Lamina Propria is dense with short and irregular papillae
  • Submucosa with many minor salivary glands (biccinator muscles my lay beneath)
  • Sebaceous glands sometimes present - become more obvious after puberty
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What’s the Linea Akba Buccalis?

A
  • Keratinised line in the buccal mucosa along the occlusal plane
  • Low grade irritation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are Ectopic Sebaceous glands?

A
  • Fordyce’s granules
  • Out of place glands
  • Don’t cause problems
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Whats the Gingiva?

A
  • Portion of the Oral Mucosa that surrounds and is attached to the teeth
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the 2 main regions of Gingiva?

A
  1. Attached Gingiva
    - Directly bound to the alveolar bone and the tooth

Coronal to the Attached is…

  1. Free Gingiva
    - Narrow rim of mucosa, not bound to any underlying hard tissue
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the boundary between the attached and free gingiva called?

A

Free Gingival Groove

-Shallow groove

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What’s the Gingival Sulcus?

A
  • The unattached region between the free gingiva and the tooth
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What’s Junctional Epithelium?

A
  • Area apical to the Gingiva Sulcus

- Where the gingiva is bound to the underlying tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How is the attached gingiva demarcated from the alveolar mucosa?

A
  • Mucogingival junction
17
Q

The Attached Gingiva: What are some of its characteristics?

A
  • External surface is masticatory mucosa
  • Keratinised
  • 75% of the surface maybe parakeratinised
  • Papillation varies
  • Stippled surface (arise form intersecting epithelial ridges
  • No submucosa
18
Q

The Free Gingiva: What are some of its characteristics?

A
  • Can be demarcated from the attached gingiva by the free gingival groove
19
Q

What’s the gap between the Enamel and Free Gingiva called?

A
  • Gingival Sulcus
  • 0.5-2mm in depth
  • Lined by Sulcular Epithelium - folded interface with the lamina propria
20
Q

The Junctional Epithelium: What are some of its characteristics?

A
  • Epithelial collar that surrounds the tooth and extends from the CEMENTO-ENAMEL JUNCTION to the bottom of the GINGIVAL SULCUS
  • High rate of turnover
  • Exfoliates coronally
21
Q

What’s special about Junctional Epithelium?

A
  • It has 2 Basal Lamina
  • Adjacent to the Enamel = attach via hemidesmosomes and a basal lamina produced by the cells) = Epithelial attachment
  • Adjacent to the Lamina Propria = same method
22
Q

What are the 2 layers of the Junctional Epithelium?

A
  1. Stratum Basale

2. Stratum Spinosum

23
Q

How does the length of the Junctional Epithelium vary over time?

A
  • At tooth eruption, most enamel is covered
  • 1/4 of enamel is covered by the time the tooth reaches occlusion
  • Gum recession causes the apical migration of the Cemento-enamel junction
24
Q

What’s Cervicular Fluid?

A
  • Fluid found within the sulcus - results from the permeability of the junctional epithelium
  • Important in the defence mechanism
  • Passes continuously from the subepithelial tissue into the gingival sulcus
  • Composition is an indicator of the health state of underlying periodontium
25
Q

What’s Interdental Papilla?

A
  • Part of gingiva between adjacent teeth
  • Shape arrangement depends on shape and contact between teeth
  • Pointed between anterior teeth
  • Fills the contour around the contact point
26
Q

What’s the Col?

A
  • Continuous with the junctional epithelium
  • Non-keratinised
  • Proximal surfaces (Distal and Mesial)
27
Q

Gingival Lamina Propria: What’s its composition?

A
  • Contains dense bundles of collagen whose function is to support the free gingiva
  • Binds attached gingiva to the alveolar bone and tooth
  • Link teeth to one another
  • Contain less contractile proteins, ground substance, Type III collagen
  • Collagen bundles are called PRINCIPLE FIBRES
28
Q

What are the 10 Principle Fibres? (1)

A
  1. Dentogingival Fibres

- Run from just above the alveolar crest on the root to the gingiva

29
Q

What are the 10 Principle Fibres? (2)

A
  1. Longitudinal Fibres

- Extend throughout the entire arch

30
Q

What are the 10 Principle Fibres? (3)

A
  1. Circular Fibres
    - Encircle each tooth within the marginal and interdental gingiva
    - Some attach to the cementum/alveolar bone
31
Q

What are the 10 Principle Fibres? (4)

A
  1. Alveologingival Fibres

- Run from the Alveolar crest, coronally into the overlying lamina propria of the gingiva

32
Q

What are the 10 Principle Fibres? (5)

A
  1. Dentoperiosteal Fibres
    - Only in Labial/Buccal/Lingual gingiva
    - Arise from Cementum and pass over Alveolar Crest to insert into the Periosteum
33
Q

What are the 10 Principle Fibres? (6)

A
  1. Transseptal Fibres
    - Pass horizontally from the root of one tooth, over the alveolar crest to be inserted into the root of the adjacent tooth
    - Provide anatomical basis for linking teeth in the dentition
    - Implicated in mesial drift (movement of teeth in Orthodontics and after tooth removal)
34
Q

What are the 10 Principle Fibres? (7)

A
  1. Semicircular Fibres
    - Arise from cementum near the CEJ, cross the free marginal gingiva and insert into a similar position on the opposite tooth
35
Q

What are the 10 Principle Fibres? (8)

A
  1. Transgingival Fibres
    - Reinforce the circular and semicircular fibres
    - Arise from the cervical cementum and extend into the marginal gingiva of the adjacent tooth, merging with the circular fibres
36
Q

What are the 10 Principle Fibres? (9)

A
  1. Interdental Fibres
    - Pass through the coronal portion of the interdental gingiva in a buccolingual direction
    - Connect Buccal and Lingual gingiva
37
Q

What are the 10 Principle Fibres? (10)

A
  1. Vertical Fibres

- Arise from attached gingiva or alveolar mucosa and pass coronally towards the marginal gingiva and interdental papilla

38
Q

Alveolar Mucosa: What are its characteristics?

A
  • Demarcated from the keratinsied attached gingiva via the MUCOGINGIVAL JUNCTION
  • Non-keratinised
  • Loose submucosa and elastin - slightly mobile
  • Rich blood supply near the surface = red appearance
  • Contains minor salivary glands

Oral Biology (33 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions