Oral Mucosa Flashcards
Oral Mucosa Function
Protection, sensation, secretion
simple epithelium
one layer
stratified epithelium
more than 1 layer
oral mucosa
stratified squamous epithelium
lines oral cavity, palate, tongue, alveolar bone
no langerhans cells- makes mucosa susceptible to allergens
keratohyaline granules (clumps of connection fibers)
2 layers of oral mucosa
1- stratified squamous epthelium: keratinized, nonkeratinized, parakeratinized
2- lamina propria: CT that supports epithelium (2 layers papillary and reticular)
Lamina Propria
mechanical support to the epithelium and carries blood vessels and nerves
papillary layer- directly under the epithelial layer, loose CT, more cells
reticular layer- dense CT fibrous layer located under papillary level
oral mucosa of cheek had thinner lamina propria than lip
Epthelium
thinnest in sublingual mucosa
alveolar mucosa has small rete pegs, gingiva has tall rete pegs
Oral Mucosa classification
- Lining (non Keratinized)- Lips, cheeks, floor of mouth, alveolar bone, soft palate, ventral tongue
- Mastificatory (keratinized)- gingiva and hard palate
- Specialized (typically keratinized)- dorsal surface of tongue
Mucocutaneous junction
transition area between skin and oral mucous membrane
vermillion border
line seperating vermillion zone and skin
outline of the lips
vermillion zone
thin, keratinized epthelium
long CT papillae
numerous capillary loops in papillae
from wet/dry border outwards- where you put chap stick
intermediate zone
between vermillion zone and labial mucosa
parakeratinized stratified squamous epthelium
Free/ marginal gingiva
- gingivl margin to free ginigival groove, gingival sulcus, vestibule and oral cavity
- typically keratinized stratified ssquamous, can be non kertanized or parakeratinized
- long thin epthelial rete pegs interdigitate with underlying CT of lamina propria
sulcular epthelium
lines the gingival sulcus. is non keratinized, thinner, and lacks the pronounced rete ridges
attached gingiva
free gingival groove to the mucogingival junction
keratinized stratified squamous with stipling
mucogingival junction
marked transition between epithelium of the attached gingiva (masticatory) and that of the alveolar mucosa (lining)
interdental papilla
occupies the embrasure between teeth
keratinized stratified squamous epthelium
Col
concave tissue between peaks of the interdental papillae
nonkeratinzied
incisive papilla
remnant of nasal palatine duct
bump on anteriomedial part of hard palate
hard palate
median raphe- keratinized
mucoperiosteum-lamina propria attached directly to teh underlying bone, no submucosa
rugae
anterolateral- contains adipose tissue
posterolateral- minor slaivary glands (sometimes parakertainized)
specialized mucosa
dorsal surface of the tongue
keratinized and non kertinized
taste buds
filiform
most numerous
dorsal tongue
no taste buds
fungiform
mushroom shaped
scattered over anterior tongue
taste buds on dorsal surface
circumvallate
largest
along sulcus terminalis
surrounded by trench
taste buds on lateral surface
