The oral mucosa in health and in disease

Question 1

name 3 different types of oral mucosa

Answer 1

masticatory mucosa - 25% of total mucosa, gingival and hard palate.Primary mucosa that is in contact with food during mastication - usually kertainized

lining mucosa - 60% of total mucosa, covers floor of mouth, ventral tongue, alveolar mucosa, cheeks, lips and soft palate
does not function in mastication and therefore has minimal attrition

specialised mucosa- 15% of total mucosa, Covers dorsal tongue and is composed of cornfield epithelial papillae

Question 2

label the dorsal surface of the tongue

Answer 2

Question 3

what is the main epithelial coverings of the oral mucosa

Answer 3

stratified squamous epithelium
keratinised/ non-keratinised

Question 4

describe the different types of tongue papillae

Answer 4

• filiform papillae
• foliate papilla
• fungiform papilla
• taste buds

Question 5

describe the structure of taste buds

Answer 5

• onion shaped sturctures in the epithelium of lingual papillae e.g fungiform and circumvallate papillae

Question 6

learn the regional variation in the oral mucosa

Answer 6

Question 7

describe the classification of oral mucosa according to clinical appearance

Answer 7

Question 8

Describe the classification of oral mucosal lesions according to aetiology

Answer 8

Question 9

Describe infective lesions: viral

Answer 9

Herpes simplex- multiple vesicles that burst in ulcers
- diagnosed by swab
- intracellular inclusione bodies

Question 10

describe another infective lesion

Answer 10

• oral thrush
  candida
• newly born children
• high dose of antibiotic patients
• palate disrupted and can affect wall tissues
• white lesions
• characterised by when you remove it
• Candida hype- penetrated

Question 11

Describe none infective ulcers

Answer 11

• aphthous ulcer
• traumatic ulcer
• squamous cell carincoma
• recurrent pathos ulcers; unknown cause, stress, crowns disease, nutritional deficiencies- vitamin B
  traumatic ulcers- caused by dentist, LA ,rare, heal within 10 days to 2 weeks
  Malignant uclers- non healing ulcer, inflammation-underlyign

Question 12

Name white and red lesions

Answer 12

white- leukoplakia
red- Erthyroplakia
speckeld meixed

Question 13

Descifrbe different types of histopahtoglogy

Answer 13

• Hyperplasia (overgrowth of epithelium)
• Hyperkeratosis
• Acanthosis (growth of prickle cell layer)

Question 14

Name 3 types of immunological lesions

Answer 14

Lichen planus- tooth pegs, inflamamory band of lymphocytes thickened basement membrane
Lichenoid reactions are lichen planus like lesions that occur in reaction to drugs

Systemic lupus - thickening of BM, inflammatory infiltration band, degeneration of epithelia cells

erthyematosus
Erythema multiform - necrosis of prickle cell layer leading to intra epithelial bulla
- no clear cause
recurrent disease

Question 15

Describe two immunological disorders

Answer 15

• pemphigus vulgaris
  cleating above the basal cell layer forming intraepithelial vesicles that can lead to ulcers, acantholysis of the prickle cell layer, inflammatory infiltration in the underlying c.t

Bullous pemphigoid - complete clean separation between epithelium and C.t which forms a huge subepthielial bulla, the underlining C.T shows minimal / light inflammation
basal cell layer forms the roots
main reaction happens to immunoglobulin