Oral Mucosa

Question 1

What epithelium is oral mucosa

Answer 1

Stratified squamous epithelium

Question 2

What structures in the mouth are covered by lining mucosa

Answer 2

. Buccal mucosa
. Labial mucosa
. Alveolar mucosa
. Floor of the mouth
. Soft palate
. Ventral surface of the tongue

It is non keratinised, It is a type of epithelium (a layer of cells that forms a protective barrier)

Question 3

What are fordyce’s spots

Answer 3

Are normal in lining of mucosa, overgrowth of ectopic sebaceous glands

Question 4

What is hyperkeratimised

Answer 4

It’s when non keratinised epithelium and transform into keratinised in response to frictional or chemical trauma, It is reversible if the cause of the trauma is removed but it can take time for the keratin to be shed.

Question 5

Where would you expect to see hyperkeratinisation

Answer 5

In areas or the oral cavity covered in lining mucosa because it is non-keratinised.

Question 6

What’s the possible cause of this hypereratinised area

Answer 6

Heat

Question 7

What’s the possible cause of this hypereratinised area

Answer 7

Chemical

Question 8

What is this caused by

Answer 8

Drug induced - tetracycline or chemotherapy

Question 9

What are covered by masticatory mucosa

Answer 9

Hard palate, dorsum of tongue, attached gingiva

2 types of keratinised epithelium:
Orthokeratinised- least common epithelium in the oral cavity (hard palate, attached gingivae)
Parakeratinised- (attached gingivae, dorsum of the tongue)

Question 10

What is affected is oral pigmentation

Answer 10

Melanin - Melanin is formed by melanocytes (originating from neural crest cells) which sit in the basal layer between the dividing epithelial cells.