Oral Mucosa 1 and 2 - Krimm Flashcards
the oral mucosa is an organ composed of 2 tissues, what are they
epithelium
lamina propria
3 functions of oral mucosa
protection - protects deeper tissues from mechanical forces and microorganisms
sensation - temperature, touch, pain and taste
secretion - Salivary glands secrete into the oral cavity. However, the oral mucosa also has serous and mucous
glands
Different oral regions are lined by _______ vs ______ epithelium, with distinctive epithelial cell types
keratinized ; non-keratinized
All epithelial cells = ______ because they contain ______
keratinocytes ; keratin
Keratins are large proteins that assemble into ________ ; and provide ________
intermediate filaments (tonofilaments)
cytoskeletal support
3 types of oral mucosa
lining
masticatory
specialized
what type of oral mucosa is this:
sheltered from stresses, nonkeratinized epithelium
Can be found in: lip, buccal wall, alveolar mucosa, floor of the oral cavity, soft palate
Lining mucosa
what type of oral mucosa is this:
higher stress areas, keratinized or
parakeratinized
Can be found in: hard palate and gums
masticatory
what type of oral mucosa is this:
mixed (keratinized, parakeratinized,
nonkeratinized)
Can be found in: tongue
specialized
stem cells are in what layer ? they also divide in this layer
stratum basale
in the lamina propia, papillae have an irregular _______ and _______
distribution ; height
Papillae contain what 3 things?
capillaries
sensory nerve fibers
Meissner’s corpuscles
submucosa contains _____ or _____
fat ; glands
the submucosa contains large _______ and _______ supplying the more superficial lamina propria
blood vessels
nerves
the submucosa separates the lamina propria from underlying _____ and ______
bone & muscle
does the mucoperiosteum have a submucosa
not really
the mucoperiosteum has epithelium connected straight to
bone
the mucoperiosteum is found in other oral regions, name them
gingiva
hard palate adjacent to gingiva and media to raphe
Collagen is greater for less ______
regions of the oral cavity
flexible
is the lining mucosa keratinized or non-keratinized
non-keratinized
the lamina propria in the lining mucosa has fewer ________ fibers and more ________ fibers
collagen ; elastic
the lamina propria in the lining mucosa has papillae of irregular _______ and _______
distribution and height
the lamina propria in the lining mucosa has a _______ present with glands and maybe fat
submucosa
the lamina propria in the lining mucosa has _____ and ______ attachment to bone
loose ; flexible
4 functional implications of lining mucosa
Low stress
High flexibility
Incisions more likely to gape &
need to be sutured
Injections less painfu
is the masticatory mucosa keratinized or non-keratinized
keratinized (parakeratinized)
the masticatory mucosa has a _____ lamina propria ; meaning is has more _______ fibers and fewer ______ fibers
dense ; collagen ; elastic
the masticatory mucosa has many long, thin, connective _________
tissue papillae
the masticatory mucosa has submucosa that is variably present, if it’s not present, what do we call it
mucoperiosteum
Functional implications of masticatory mucosa
locations of high stress ,e.g.,
abrasion
Incisions don’t gape, may not require suturing
Injections more painful
nuclei that is visible going up to the surface is a sign that the tissue is _________
non-keratinized
in masticatory mucosa, the lamina propria is ______ flexible than lining mucosa
less
what mucosa is located on the soft palate
lining
what mucosa is more permeable? lining or masticatory
lining
the lamina propria of lining mucosa contains more type ___ collagen
3
part of the oral cavity bound by the lips and the cheek
- includes: lip, buccal mucosa, alveolar mucosa
oral vestibule
separated from the vestibule by the
teeth and gingiva
- includes: floor of oral cavity, tongue, palate, gingiva
oral cavity proper
what kind of mucosa is found in these locations:
upper lip
alveolar mucosa
soft palate
cheek
underside of tongue
floor of mouth
lining mucosa
what kind of mucosa is found in these locations:
gingiva
hard palate
masticatory mucosa
the lip has a ___ epithelium which allows us to see the blood vessels and why the lips appear red
what kind of epithelium?
thin ; keratinized
the skin has what kind of epithelium
keratinized
the skin has what 2 kinds of glands
sebaceous glands
eccrine sweat glands
the vermillion (transitional) zone of the lips has numerous narrow ______ that are close to the surface in the papillae layer
papillae
the vermilion (transitional) zone doesn’t have any _____ which makes it hard to stay moist
glands
the vestibular surface is ____ and has what kind of epithelium
Thick ; nonkeratinized
the vestibular surface contains minor _____ glands
salivary
the buccal mucosa has a very _____
what kind of epithelium
thick ; nonkeratinized
the buccal mucosa has papillae contain _____ and _______ fibers with a rich ______ supply
collage ; elastic ; vascular
the buccal mucosa has minor _____ glands and sometimes _______ glands
salivary ; sabaceous
misplaced sebaceous glands
fordyce spots
the alveolar mucosa is ____ with what kind of epithelium
thin ; nonkeratinized
the papillae in the alveolar mucosa are _____ or ______ ; with a ____ lamina propria containing _______ fibers
short ; absent ; thin ; elastic
the alveolar mucosa has minor _____ glands
salivary
the floor of the mouth has a very ____ what kind of epithelium
thin ; nonkeratinized
the floor of the mouth has short _________
dermal papillae
the floor of the mouth has _____ connective tissue containing ____ cells
loose ; fat
the floor of the mouth has _____ salivary glands that are ____ but mostly ______
sublingual ; mixed ; mucous
the soft palate has ____ what kind of epithelium
thin ; nonkeratinized
the soft palate has _____ papillae with many ____ fibers in _____ lamina propria
short ; elastic ; deep
the soft palate has lots of _____ glands of the palate
mucous
what are the 2 subdivisions/zones of the hard palate
fatty zone
glandular zone
the hard plate has thick ________ or ________ epithelium
parakeratinized ; keratinized
the hard palate has numerous ______ and is rich in ______
papillae ; collagen
trigeminal nerve innervation - what deals with pain
free nerve endings
trigeminal nerve innervation - what deals with touch
meissener’s corpuscles
trigeminal nerve innervation - what deals with temperature
krause end bulbs
about 1/3 of the _______ are found in the dentogingival junction
desmosomes
the dentogingival junction has large ________ spaces and a weak ___________
extracellular ; mechanical barrier
new enamel epithelium gets converted to
junctional epithelium
because new enamel epithelium gets converted to junctional epithelium, JE has different ______ and _____
development
origin
what kind of eruption?
the bodily movement of the developing tooth through the overlying oral mucosa into the oral
cavity
active
what kind of eruption?
the uncovering of the anatomic crown because of apical recession of the surrounding tissues
passive
Passive Eruption - Stage 1
The junctional epithelium is located
entirely over the ______
enamel
Passive Eruption - Stage 2
The junctional epithelium is located in part over the ______ and part over the _______
enamel ; cementum
Passive Eruption - Stage 3
The entire junctional epithelium is
located over cementum, with its coronal end at the
cemento-enamel junction (CEJ)
Passive Eruption - Stage 4
The entire junctional epithelium is
located ______ to the ________
apical ; CEJ
sulcular epithelium faces the _____ but is not ________
tooth ; attached
what attaches the junctional epithelium to the tooth
basal lamina-like structure
(basal lamina against tooth with hemi-desmosomes attached and intermediate filaments attached to the hemi-desmosomes)
specialized mucosa of the tongue is located on the _______ surface of
the body (aka the __________) of the
tongue
superior ; anterior 2/3
specialized mucosa of the tongue is characterized by
lingual papillae
the epithelium of the specialized mucosa of the tongue may be ________ , _________ , or __________
keratinized
parakeratinized
nonkeratinized
the __________ is a component of the lingual papillae of the specialized mucosa of the tongue
lamina propria
Spine-shaped & heavily keratinized
Do not contain buds!
Innervated by somatosensory fibers
Filiform papillae
mushroom shaped bumps
fungiform-papillae
_________ papillae are located among more numerous filiform papillae
fungiform
fungiform papillae has a keratin layer that is interrupted at the
pore
Fungiform papillae on dorsal anterior tongue is innervated by
chorda tympani branch of VII
__________ papillae is strategically located to monitor food entering mouth
fungiform
_________ papillae has ~1600 taste buds and is most numerous at the tip
fungiform
Buds are on the ________ surface of fungiform papillae
dorsal
_________ papillae monitor food just before swallowing
circumvallate
there are around 8-10 _________ papillae with ~2400 buds and they are concentrated
circumvallate
_________ papillae have central connective tissue core surrounded by trench and are arranged in a “V” on the most posterior anterior tongue
circumvallate
circumvallate tastebuds are located in the ______ , not the dorsal surface
trench
circumvallate is innervated by
glossopharyngeal (CN IX)
______ papillae has 2-9 parallel folds and dorsoventral orientation
Foliate
_______ papillae are on the lateral aspect of most posterior anterior tongue (posterior to molars, anterior to CV’s)
foliate
_______ papillae monitor food during chewing
foliate
Foliate taste buds are located in
_____ ,not on the surface
trenches
Foliate taste buds are closely associated with ________ glands
salivary
Taste buds have primary afferent
fibers at base and some bud cells
make synapses with these fibers - this is how ______ communication happens
taste
the lamina propria of lining mucosa has elastic fibers and what 2 types of collagen
type 1 and 3
the lamina propria of masticatory mucosa has fewer elastic fibers and what 2 types of collagen (but more of which)
high in type 1 and less type 3
