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M3 Oral Biology > Oral Mucosa > Flashcards

Oral Mucosa Flashcards

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1
Q

What are the 2 basic tissues in oral mucosa?

A

Epithelium- superficially

Connective tissue - underlying

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2
Q

What are the functions of oral mucosa?

A
  • Protection
  • mechanical
  • bacterial
  • chemical
  • prevent dehydration
  • sensation - richly innervated
  • Secretion
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3
Q

Label the diargram

A
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4
Q

What type of mucosa is the blue, green and red lines?

A
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5
Q

What are the layers of Non-keratinised lining mucosa?

A
  1. Epithelium
  2. Lamina Propria
  3. Submucosa
  4. Bone or muscle

It is flexible and not subjected to high stress.

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6
Q

What type of epithelium is in Non-keratinised lining mucosa and what are the layers of it?

A

Stratified squamous epithelium

  1. Superficial Layer
  2. Intermeduate Layer
  3. Prickle cell Layer
  4. Basal Cell layer
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7
Q

What do all epithelial cells have?

A
  • Filaments
  • Desmosomes
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8
Q

What are Prickle cells and Basal cells?

A

Prickle cells

  • membrane coating granules

Basal Cells

  • lest differentitated
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9
Q

What are Intermediated layer cells?

What is the clinical Importance?

A

Membrane coating granules

  • Discharge contentes between cells permeability barrier

Clinical Importance:

Drugs can be absorbed through mucosa main one is GTN for Angina.

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10
Q

What is the Keratinised masticatory mucosa structure?

A
  1. Papillary layer
  2. reticular layer
  3. periosteum
  4. bone - tightly bound

Reatively immoble and tough

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11
Q

What is the layers of epithelium in Keratinised masticatory mucosa?

A
  1. Keratinised Layer
  2. Granular Layer
  3. Prickle Cell Layer
  4. Basal Cell Layer
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12
Q

What are Granular layer cells?

A

Membrane coating granules that discharge contents sealing cells together for effective permeability barrier

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13
Q

What are Keratinised layer cells?

A
  • flattened cells
  • no organelles
  • contain filled with “keratin”
  • dehydrated - not flexible
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14
Q

What 4 cells are Non-keratinocytes – “clear cells”?

A
  • Merkel cells
  • Melanocytes
  • Langerhan’s cells
  • Inflammatory cells

10% of epithelial cells

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15
Q

What 2 cells are in the basal layer?

A

Merkel Cells

  • touch receptors

Melanocytes

  • dense melanosomes
  • melanin
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16
Q

What is the layers of Specialised mucosa?

A
  1. Epithelium - papillae
  2. Lamina Propria
  3. Muscle
17
Q

What is the location and structure of Filiform papillae?

A

Location:

• Anterior part of the tongue

Structure:

  • Cone shaped
  • Connective tissue core
  • Keratinised epithelial cover

▪ tough abrasive surface

• Non-keratinised epithelium in between - flexibility

18
Q

What is the location and innervation of Fungiform papillae?

A

Location: • Anterior part of the tongue

Innervation: • VII Facial (carried by lingual via chorda tympani)

Clinically: red spots

19
Q

What is the location and innervation of Foliate papillae?

A

Location: • Lateral margin of posterior aspect

Innervation: • VII (anterior) • IX (Posterior)

20
Q

What is the location and innervation of Circumvalate papillae?

A

Location: • Anterior to sulcus terminalis

Innervation: • IX glossopharyngeal

21
Q

What does the serous glands of von Ebner do?

A

serous glands of von Ebner:

  • diffusion pathway
  • remove stimuli by active secretion
  • secrete binding proteins

M3 Oral Biology (6 decks)

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