Histo 40: Oral Cavity

space between the lips and teeth:

oral vestibule

what are the subdivisions of the oral cavity?

oral vestibule
oral cavity proper
fauces

what are the important functions of the oral cavity?

sensory
secretion
mastication
teeth
oral competence

space between teeth and soft palate:

oral cavity proper

what is the gate from the oral cavity proper to the oropharynx?

fauces

what are the boundaries of the fauces:

palatoglossal arch
palatopharyngeal arch
soft palate/uvula
tonsillar fossa w/ palatine tonsils

what is #1

mucogingial junction (gingiva and alveolar gingiva separation)

what are the 2 layers of the oral mucosa?

epithelium
lamina propria

what layer of mucosa is absent in the oral mucosa that is usually present in other mucosa?

muscularis mucosa

what is the CT beneath the mucosa, often w glands?

submucosa (often absent in oral mucosa)

what are the 4 layers of general mucosa?

mucosa
submucosa
muscularis externa
adventitia/serosa

the majority of the oral mucosa is what type of epithelium?

stratified squamous non-keratinized epithelium

identify the mucosa:

stratified squamous non-keratinized epithelium

identify the mucosa:

stratified squamous parakeratinized epithelium

identify the mucosa:

stratified squamous parakeratinized epithelium (SSKE)

identify the mucosa:

stratified squamous keratinized epithelium (SSKE)

the difference between keratinized and parakeratinized epithelium is the presence of ________ in the stratum corneum

nuclei

functional difference between SSNKE and SSKE

SSNKE = keep surface moist
SSKE = waterproof, dry surface

the vermilion border of lip has what type of epithelium?

stratified squamous keratinized epithelium

lining oral mucosa has what type of epithelium?

stratified squamous non-keratinized epithelium

masticatory mucosa (gingiva and hard palate) has what type of epithelium?

SSKE, SSPKE

vermilion border of lip what type of epithelium?

keratinized SSKE, SSPKE

the dorsum of the tongue has what type of mucosa?

specialized mucosa

the hard palate has what type of mucosa?

masticatory mucosa

the gingiva has what type of mucosa?

masticatory mucosa

the lips have what type of mucosa?

lining mucosa

the cheeks have what type of mucosa?

lining mucosa

the vestibule have what type of mucosa?

lining mucosa

the alveolar mucosa have what type of mucosa?

lining mucosa

the floor of the mouth has what type of mucosa?

lining mucosa

the soft palate has what type of mucosa?

lining mucosa

the inferior surface of the tongue has what type of mucosa?

lining mucosa

identify the mucosa:

labial mucosa

the transitional part between the skin and mucosa part of the lips:

vermillion

what part of the labial mucosa is this:

cutaneous

what part of the labial mucosa is this:

mucosal

what part of the labial mucosa is this:

vermillion

patient presents with the following. They claim that they just tried new lip balm. Only the cutaneous and vermillion part of the are effected. What is the diagnosis?

cheilitis

patient presents with the following. They also present with other nutritional deficits. Only the mucosal part of the are effected. What is the diagnosis?

cheilosis

canker sores (most commone ulceration of oral mucosa/cavity)

cold sore (caused by herpes simplex virus)

thrush (fungal infection)

buccal mucosa

identify the mucosa:

buccal mucosa

Sebaceous glands in oral mucosa:

Fordyce spots

identify the mucosa:

alveolar mucosa

injections for anesthesia painful in gingiva or areas of mucoperiosteum due to the lack of _______

submucosa

what mucosa separates alveolar mucosa and gingiva?

mucogingival mucosa

what accounts for the color change betwen alveolar mucosa and attached gingiva?

alveolar mucosa has SSNKE epithelial cells while gingiva has SSKE/SSPKE and a layer of connective tissue (harder to see through the keratonized layer into the blood vessels)

identify the projections:

rete pegs and CT papilla (increases friction to withstand pressures from mastication)

the gingiva covering alveolar bone has _________ over the surface and has a rough, orange peel-like texture

stippling

identify the mucosa

sulcular epithelium

epithelial lining of the gingival sulcus:

sulcular epithelium

gingiva that attaches to the alveolar bone:

attached gingiva

gingival epithelia that attaches to the tooth:

junctional epithelia

which gingival epithelium has two basal laminae?

junctional epithelia

what type of epithelium is junctional epithelia?

stratified squamous non-keratinized epithelium

what type of epithelium is sulcular epithelia?

stratified squamous parakeratinized epithelium

what is in the anterior region of the hard palate?

fat pad (cushion for food)

what is in the posterior region of the hard palate?

salivary glands

identify the mucosa:

specialized mucosa

identify the mucosa:

palatine mucosa

identify the papillae:

filiform papillae (“hooks” that move food toward pharynx)

identify the papillae:

fungiform papillae (“mushroom”)

identify the papillae:

circumvallate papillae (“moat”)

identify the papillae:

foliate papillae

which papillae are located on the lateral side of the tongue:

foliate papillae

which papillae are most numerous on the dorsum of the tongue?

filiform papillae

which papillae do not contain tastebuds?

filiform papillae

which papillae contain 1-3 tastebuds and are located on the dorsum of the tongue?

fungiform papillae

which type of papillae is on lateral of tongue and is poorly developed in humans containing variable number of taste buds?

foliate papillae

which papillae contain 8-10 papillae surrounded by wall (vallum) nad have numerous taste buds on lateral surfaces of papillae and walls?

circumvallate papillae

which papillae have Ebger glands? what are they?

circumvallate papillae

wash out taste buds so we can taste new things

taste (gustatory) buds have 50-150 receptor cells on

microvilli