pre BDS4 1 Flashcards
what are the 3 layers of the skin
epidermis
dermis
subcutaneous layer
what are the 4 (5) layers of the epidermis
stratum basal
stratum spinosum
stratum granulosom
stratum lucidum - only in thick skin
stratum corneum
name 4 types of cells found within the epidermis
melanocytes
merkel cells (sensory receptors)
langerhans cells (antigen presenting cells)
Keratinocytes
name 4 things contained within the dermis
blood vessels, hair follicles, fibroblasts, macrophages
what are the 2 layers of the dermis
papillary layer
reticular layer
what are the 3 layers of the oral mucosa
surface squamous stratified epithelium
lamina propria
submucosa (not present in all regions)
what are the 3 types of oral mucosa
lining
masticatory
specialised
lining mucosa
- where is it found
- keratinised?
- lamina propria/ submucosa?
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
Masticatory mucosa
- where is it found
- keratinised?
- lamina propria/ submucosa?
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
specialised mucosa
- where is it found
- keratinised?
dorsum of tongue
keratinised
orthokeratinised vs parakeratinised
ortho - pure keratin, no cell nuclei
para - nuclei of dead cells remain , appear as black dots histologically
most common location of fordyce spots
buccal mucosa and vermillion border of the lips
most common location for linea alba
buccal mucosa along occlusal plane , horizontal line
histologically what is seen in linea alba
hyperkeratosis, acanthosis, prominent or reduced granular layer
most common cause of linea alba
parafunctional habits - clenching/ grinding
Proper name for geographic tongue
benign migratory glottis or erythema migrans
what happens in geographic tongue
loss of filliform papillae
some areas of atrophy and some areas of hyperkeratinisation
cause of black hairy tongue (disease process)
hyperplasia of filiform papillae
build up of commensal bacteria and food debris on tongue sees filiform papillae elongate to reach the surface
treatment of black hairy tongue
stop smoking
stay hydrated
lightly brush tongue
eat fresh pineapple
what is desquamative gingivitis
not a diagnosis, a descriptive term to describe full thickness erythema of gingiva
