oral mucosa Flashcards
what is the function of the oral mucosa?
protection (mechanical and infection), sensation, secretion, absorbtion, thermoregulation
what are the 3 types of oral mucosa?
lining mucosa, masticatory mucosa, gustatory mucosa
is masticatory mucosa keratinised, parakeratinised or nonkeratinised?
parakeratinised
what is the difference between a keratinised cell and a parakeratinised cell?
parakeratinised cells still contain a nucleus unlike keratinised cells
masticatory cells have a thick lamina propria (mucoperiosteum), what is the function of this?
connects mucosa and bone
which type of oral mucosa has no submucosa?
masticatory mucosa
what type of epithelium are found in masticatory mucosa?
keratinised stratified squamous
where is masticatory mucosa found?
hard palate and attached gingiva
is lining mucosa keratinised?
no
which mucosa has a quicker turnover, lining or masticatory?
lining
is gustatory mucosa keratinised, parakeratinised or nonkeratinised?
keratinised
where is gustatory mucosa found?
dorsal of tongue
the dorsal of the rogue contains small projections, some of which contain taste buds what are these called?
papillae
name the layers of the the oral mucosa
epithelium, lamina propria, submucosa, bone
name the layers of epithelium in the oral mucosa working from the outermost layer inwards
cornfield layer, granular layer, prickle cell layer, basal layer
what is the auction between lining mucosa and masticatory mucosa called?
mucogingival junction
what cells in the oral mucosa are non-keratinocytes?
melanocytes, merkel cells, langerhans cells
what is the function of melanocytes?
pigment producing
what is the function of merkel cells?
associated with mechanoreceptor neutrons
what is the function of langerhans cells?
dendritic cells, antigens-presenting
where in the oral mucosa are the merkel and melanocytes found?
stratum basale or basal layer of epithelium
where in the oral mucosa are langerhans cells found?
above basal layer of epithelium
name 3 types of papillae on the gustatory mucosa that contain taste buds
foliate, fungiform and vallate
where are filiform and fungiform papillae found?
tip of tongue
where are valuate papillae found?
back of tongue
what are the other 2 names for geographical tongue?
benign migratory glossitis, glossitis migrant
which papillae is missing on geographical tongue?
filliform
name some diseases of the oral mucosa
oral infection, recurrent ulceration, vesiculo-bullous lesions, pigmented lesions, white patches, premalignant conditions and oral cancer
which nerve innervates fungiform papillae ?
facial
which nerve innervates filiform papillae ?
glossopharyngeal
which nerve innervates circumvallate papillae ?
glossopharyngeal
which type of papillae do not contain taste buds?
filiform
