pre BDS4 1 Flashcards

1
Q

what are the 3 layers of the skin

A

epidermis
dermis
subcutaneous layer

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2
Q

what are the 4 (5) layers of the epidermis

A

stratum basal
stratum spinosum
stratum granulosom
stratum lucidum - only in thick skin
stratum corneum

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3
Q

name 4 types of cells found within the epidermis

A

melanocytes
merkel cells (sensory receptors)
langerhans cells (antigen presenting cells)
Keratinocytes

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4
Q

name 4 things contained within the dermis

A

blood vessels, hair follicles, fibroblasts, macrophages

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5
Q

what are the 2 layers of the dermis

A

papillary layer
reticular layer

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6
Q

what are the 3 layers of the oral mucosa

A

surface squamous stratified epithelium
lamina propria
submucosa (not present in all regions)

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7
Q
A
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8
Q

what are the 3 types of oral mucosa

A

lining
masticatory
specialised

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8
Q

lining mucosa
- where is it found
- keratinised?
- lamina propria/ submucosa?

A

lines the mobile structures of the mouth e.g FOM, soft palate, lips, cheeks
Non keratinised stratified squamous epithelium
lamina propria contains elastic fibres allowing stretch
Has submucosa allowing compression

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8
Q

Masticatory mucosa
- where is it found
- keratinised?
- lamina propria/ submucosa?

A

tightly bound to underlying bone in the attached gingiva and the hard palate
either ortho or para keratinised
very little or no submucosa, lamina propria may be directly bound to bone

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8
Q

specialised mucosa
- where is it found
- keratinised?

A

dorsum of tongue
keratinised

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9
Q

orthokeratinised vs parakeratinised

A

ortho - pure keratin, no cell nuclei
para - nuclei of dead cells remain , appear as black dots histologically

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10
Q

most common location of fordyce spots

A

buccal mucosa and vermillion border of the lips

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11
Q

most common location for linea alba

A

buccal mucosa along occlusal plane , horizontal line

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12
Q

histologically what is seen in linea alba

A

hyperkeratosis, acanthosis, prominent or reduced granular layer

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13
Q

most common cause of linea alba

A

parafunctional habits - clenching/ grinding

14
Q

Proper name for geographic tongue

A

benign migratory glottis or erythema migrans

15
Q

what happens in geographic tongue

A

loss of filliform papillae
some areas of atrophy and some areas of hyperkeratinisation

16
Q

cause of black hairy tongue (disease process)

A

hyperplasia of filiform papillae
build up of commensal bacteria and food debris on tongue sees filiform papillae elongate to reach the surface

17
Q

treatment of black hairy tongue

A

stop smoking
stay hydrated
lightly brush tongue
eat fresh pineapple

18
Q

what is desquamative gingivitis

A

not a diagnosis, a descriptive term to describe full thickness erythema of gingiva