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52 Cards in this Set
- Front
- Back
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Functions of the oral cavity
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protection against abrasion
protection against bacteria sensory digestive speech secretion respiration |
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Ring of Waldeyer
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palatine + lingual + pharyngeal tonsils encircling the posterior part of the oral cavity
helps to protect against bacteria via the immune response |
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Nitroglycerin
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can be very quickly absorbed thru the extremely thin mucosa in the floor of the mouth
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oral mucosa
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darker in color than the skin
bright red = diseased salmon pink = healthy moist surface forms a gel-like clot (not a dry scab as in integument) doesn’t have appendages like sweat glands but has salivary glands smoother surface than the skin |
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linea alba
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white keratinized line along the buccal mucosa
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rugae
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transverse mucosal ridges on the hard palate
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stippling
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indication of healthy gingiva
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Fordyce Granules
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benign condition
ectodermal precursor was deposited in certain areas to later become sebaceous glands - but they should not exist in the oral cavity embryological accident Looks like pale yellow spots |
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types of mucosa of the oral cavity
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Masticatory
Lining/Reflecting Mucosa Special |
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Masticatory Mucosa
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keratinized, immoveable, firm
subjected to a lot of abrasion |
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lining / reflecting mucosa
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un-keratinized, moveable, soft
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Special Mucosa
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Consists of papillae on the dorsum of the tongue
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endogenous pigmentation
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color produced by melanin & hemoglobin
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exogenous pigmentation
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Color produced by external factors such as amalgam tattoo and Burton's line
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amalgam tattoo
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“staining” caused by leakage of the metal components out of amalgam restoration
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Burton’s Line
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Dark line staining of gingiva caused by metal toxicity to lead or mercury
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What occurs to Epithelium as you age
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Gets thinner
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Whats occurs to Rete pegs as you age
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Get shorter
Therefore Epithelium and CT are not as firmly attached to each other |
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What occurs to filiform papilla as you age
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They decrease
Due to less Vit B |
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What occurs to Langerhan cells as you age
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They decrease
Therefore less immune response |
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What occurs to Fordyce Granules as you age?
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They increase
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What occurs to varicosities as you age?
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Develop Caviar tongue to to varicose veins in lingual
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What occurs to pulp as you age?
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Pulp has less cells and more collagen fibers
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What occurs to minor salivary glands as you age?
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They atrophy
Leads to xerostomia and increased incidence of root caries |
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Lamina Propria
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typical CT w/ collagen, reticular, elastic fibers
NEVER has glands except for Von Ebner minor salivary glands |
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Where are Von Ebner salivary glands
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Located in Lamina Propria of Oral Mucosa
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What is the only gland found in the Lamina Propria
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Von Ebner minor salivary glands
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Oral Epithelium
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Stratified squamous
Keratinization based on location Has rete peds Same strata as skin |
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Where can you find Langerhan cells?
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Found in Stratum Spinosum of Oral Epithelium
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Merkel Cells
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Sensory receptors in the Stratum Basale of Oral Epithelium
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Oral Submucosa
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Thin areolar CT
Glands Adipose tissue |
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Supporting wall of Oral Cavity
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Cementum, bone or muscle
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Supporting wall of gingiva
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Mucoperiosteum and cementum
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Supporting wall of hard palate
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Periosteum
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Supporting wall of soft palate
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Skeletal muscle
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Supporting wall of floor of mouth
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Loose attachment
Allows mobility of tongue |
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What type of epithelium can be found on gingiva
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Thick, keratinized with numerous, long rete pegs
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What type of epithelium can be found on hard palate
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Thick, keratinized with numerous, long rete pegs
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Where does gingiva have glands
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It has no glands in both lamina propria and submucosa
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Where does hard palate have glands
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Only in submucosa
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Which portion of the oral cavity has the thinnest epithelium
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Floor of oral cavity
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Where are the glands located for the vermillion border of the lips
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There are no glands in both lamina propria and submucosa
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What areas of the oral cavity have absolutely no glands?
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Gingiva and vermillion border of the lips
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Filiform Papillae
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cone-shaped
most numerous fully keratinized w/ NO taste buds help propel food backwards Projects above the tongue surface |
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Fungiform Papillae
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dome-shaped
scattered partially keratinized Taste buds for sweet / salty projects above the tongue surface |
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Circumvallate Papillae
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largest
10-12 located along the V-shaped Sulcus Terminalis recessed into surface of the tongue debris can accumulate in trench have Von Ebner’s Glands (minor salivary glands) to release secretions into the crypts to wash away debris partially keratinized taste buds for sour |
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Foliate Papillae
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not really prominent in humans
taste buds for sour |
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aspirin burn
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long topical exposure causes necrosis & sloughing of the mucosa
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dental fluorosis
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white to brown spots on enamel surface depending on severity
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tetracycline
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stains hard tissues like bone & teeth
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black hairy tongue
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hypertophy of the filiform papillae
Caused by foods, nicotine, antibiotics |
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Enamel Erosion
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Caused by chewable aspirin and Vit-C
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