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Oral Mucosa
Oral Mucosa
86
Anatomy
12/01/2012

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Term
What is the oral mucosa?
Definition
the lining of the oral cavity
Term
What is the oral mucosa composed of?
Definition
stratified squamous epithelium over connective tissue core
Term
Where is the oral mucosa?
Definition
extends from lips to the oropharynx
Term
What are the three types of oral mucosa?
Definition
1.Lining mucosa
2.Masticatory mucosa
3.Specialized mucosa
Term
Is lining mucosa ketatinized? How does it look?
Definition
no, it looks translucent
Term
Does the lining mucosa stretch? What else does it do?
Definition
yes, it stretches and compresses
Term
Are a lot of rete pegs found in oral mucosa?
Definition
no, there are only a few
Term
Where are the elastic fibers of the oral mucosa found?
Definition
there are a lot, they are found in the lamina propria
Term
What are the areas with lining mucosa? (4)
Definition
1.buccal and labial mucosa
2.floor of the mouth
3.ventral surface of the tongue
4.soft palate
Term
What could loose rete pegs indicate?
Definition
perio disease
Term
Is masticatory mucosa keratinized? What is its texture like?
Definition
yes, it has a firm and resilient texture
Term
Does masticatory mucosa have a lot of rete pegs? What else does it have?
Definition
numerous rete oegs and capillary papillae interdigitating to give a firm base
Term
What is the submucosa like in masticatory mucosa?
Definition
thin or absent
Term
Where is masticatory mucosa found?
Definition
1.on hard palate
2.attached gingiva
3.dorsal surface of tongue
Term
What is specialized mucosa most associated with?
Definition
with taste buds ans tactile stimulation
Term
What is specalized mucosa?
Definition
discrete structures of epithelium and lamina propria in the form of the lingual papillae
Term
How many layers is nonkeratinized epithelium?
Definition
3 layers within the epithelium
Term
What are the three layers of nonkeratinized epithelium?
Definition
1.stratum basale
2.stratum intermedium
3.stratum superficiale
Term
What is the difference between parakeratinized epithelium and keratinized?
Definition
in para, the top layer still has nucleus and in keratinized the top layer doesn't have a nucleus, just the sac
Term
What is another name for the prickle layer?
Definition
stratum synosum
Term
What are the 4 layers of parakeratinized or keratinized epithelium?
Definition
1.stratum basale
2.stratum spinosum
3.stratum granulosum
4.stratum corneum
Term
What is the cytoplasm of keratinized epithelium filled with?
Definition
keratin
Term
What is parakeratinized/keratinized epithelium function to do?
Definition
waterproof, opaque material serves to protect from physical, chemical, and microbial attack as well as dehydration and heat loss
Term
What is lamina propria?
Definition
the connective tissue below the epithelium
Term
What are the two layers of the lamina propria?
Definition
1.papillary
2.dense
Term
What is the papillary layer of the lamina propria contain? (3)
Definition
1.loose connective tissue
2.blood vessels
3.nerves
Term
What does the dense later of the lamina propria contain?
Definition
dense connective tissue with a lot of fibers
Term
Is labial and buccal mucosa keratinized?
Definition
no!
Term
What are two distinctive qualities of labial and buccal mucosa?
Definition
1.contain elastic fibers
2.have an extensive vascular supply
Term
What does the submucosa of labial and buccal mucosa have? (3)
Definition
1.minor salivary glands
2.adipose tissue
3.muscle
Term
What does labial and buccal mucosa look like?
Definition
opaque pink, shiny, moist
Term
What are some things you may see on labial and buccal mucosa?
Definition
fordyce granules and pigmentation
Term
Where is alveolar mucosa?
Definition
extends from attached gingiva to the muccobuccal fold
Term
Is alveolar mucosa keratinized?
Definition
no
Term
What are two qualities that alveolar mucosa has that labial and buccal mucosa also have?
Definition
elastic fibers and extensive vascular supply
Term
What does alveolar mucosa have a loose attachment to?
Definition
submocosa with minor salivary glands
Term
What does alveolar mucosa look like?
Definition
reddish-pink, shiny, moist, mobile
Term
Is the floor of the mouth and ventral surface of the tongue keratinized?
Definition
no
Term
What does the floor of the mouth and ventral side of the tongue have in common with the labial and buccal mucosa and alveolar mucosa?
Definition
has elastic fibers and extensive vascular supply
Term
What does the floor of the mouth and ventral side of the tongue look like?
Definition
reddish-pink with blue vascular areas, shiny, moist, mobile
Term
Where is the floor of the mouth attached?
Definition
loosely attached to submucosa
Term
Where is the ventral side of the tongue attached?
Definition
firmly attached to muscle
Term
Is the soft palate keratinized?
Definition
no
Term
What is the elastic layer in the soft palate like?
Definition
dense elastic layer for mobility
Term
What does the submucosa in the soft palate like?
Definition
has minor salivary glands and adipose tissue
Term
What is the soft palate firmly attached to?
Definition
muscle
Term
What is the appearance of the soft palate?
Definition
deep pink with yellow hue, moist
Term
What is adipose tissue?
Definition
fat tissue
Term
Is masticatory mucosa/attached gingiva keratinized?
Definition
yes
Term
What does the attached gingiva contain?
Definition
numerous tall, narrow CT papillae and rete pegs
Term
What is the attached gingiva like?
Definition
-opaque
-pale pink
-dull
-firm
-immobile
Term
What does the lamina propria attach to in attached gingiva?
Definition
directly to the underlying bone
Term
Is the hard palate keratinized?
Definition
yes
Term
What does the middle rugae and raphe lamina propria attach to?
Definition
the bone
Term
what do lateral portions of the hard palate have?
Definition
a submucosa with asipose tissue and salivary glands
Term
What does the hard palate look like?
Definition
pink in center with yellow hue to lateral portions
Term
What type of mucosa is on the dorsal surface of the tongue?
Definition
masticatory and specialized mucosa
Term
What are the 4 types of papillae found on the dorsal surface of the tongue?
Definition
1.fungiform
2.fugiform
3.foliate
4.circumvallate
Term
What so fungiform look like? WHat are they associated with?
Definition
look like mushrooms, associated with taste
Term
What do filiform look like? What are they associated with?
Definition
connective tissues, used for tactile sensation on tongue
Term
Where are foliate papilla found? Where are they associated with?
Definition
on the side of the tongue, associated with taste
Term
What are circumvallate associated with? What type of saliva do they excrete?
Definition
taste, only serous saliva
Term
What is melanin?
Definition
pigmentation that helps protect skin
Term
What forms melanin?
Definition
melanocytes
Term
Where are melanocytes located?
Definition
between epithelial cells in basal layer
Term
What do melanocytes produce? What do these store?
Definition
produce melanosomes which store melanin pigment
Term
Where are melanosomes injected into?
Definition
nearby epithelial cells
Term
What is pigmentation of the oral mucosa controlled by?
Definition
genetics
Term
Are the renewal rates higher for oral epithelium or skin?
Definition
oral epithelium
Term
What is the renewal rate for skin?
Definition
27 days
Term
What is the renewal rate for the hard palate?
Definition
24 days
Term
What is the renewal rate for the floor of the mouth?
Definition
20 days
Term
What is the renewal rate for buccal/labial mucosa?
Definition
14 days
Term
What is the renewal rate for taste buds/attached gingiva?
Definition
10 days
Term
What is the renewal rate for junctional epithelium?
Definition
4-6 days
Term
What forms blood clots?
Definition
fibrin and WBC in the area
Term
What is granulation tissue formed from?
Definition
fibroblasts and blood vessels in lamina propria
Term
What migrates under a blood clot?
Definition
epithelial cells
Term
What replaces granulation tissue?
Definition
scar tissue
Term
What are two things in the mouth that reduce with age?
Definition
stippling and taste
Term
What else do we see more of in aging?
Definition
more lingual varicosities(like varicose veins on tongue)
Term
Do we see more fordyce granules in older or younger people?
Definition
older
Term
As one ages, does the mitotic rate of epithelium increase or decrease?
Definition
decrease, takes longer to heal
Term
What happens to masticatory muscles as one ages?
Definition
karatinization declines
Term
What happens to collagen fibers as you age?
Definition
they thicken and are arranged in dense bundles
Term
What happens to fibroblasts as you age?
Definition
they decrease and are less active