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Oral mucosa is composed of_________ overlying a connective tissue proper, or__________
- stratified squamous epithelium
- lamina propria
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What are the 3 main types of mucosa found in the oral cavity?
- lining
- masticatory
- specialized
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Which type of mucosa has a softer surface texture?
lining mucosa
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Histologically lining mucosa is associated with what type of epithelium?
nonkeratinized stratified squamous epithelium
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The general histological features of lining mucosa allows it to serve in regions in the mouth where a______________base is needed
moveable
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The moveable base in lining mucosa allows for what 3 things?
- speech
- mastication
- swallowing`
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What 5 structures in the mouth have lining mucosa?
- buccal and labial mucosa
- alveolar mucosa
- floor of the mouth
- ventral surface of the tongue
- soft palate
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In what type of mucosa do surgical procedures usually require sutures for closure?
lining mucosa
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Normal variant, and visible as small, yellowish elevations on the surface of mucosa, usually lining mucosa
Fordyce's spots/granules
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Where will you usually find Fordyce's spots/granules?
Lining mucosa
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true or false. It is easier to inject local anesthetic in lining mucosa
true
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What is a downside of lining mucosa that we discussed in class?
infections spread quickly in it
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Masticatory mucosa is noted for what 2 things?
- rubbery surface texture
- resiliency
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What 3 structures have masticatory mucosa?
- attached gingiva
- hard palate
- dorsal surface of the tongue
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Histologically, masticatory mucosa is associated with what kind of epithelium?
Keratinized stratified squamous epithelium
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What are the 2 different types of keratinized epithelium?
- orthokeratinized
- parakeratinized
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Masticatory mucosa that has NO nuclei and is white
orthokeratinized
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What type of mucosa is least common in the oral cavity?
orthokeratinized masticatory mucosa
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Orthokeratinized masticatory mucosa protects against what 5 things?
- physical attack
- chemical attack
- microbial attack
- dehydration
- heat loss
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Masticatory mucosa that has nuclei
parakeratinized
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masticatory mucosa that is associated with a higher level of attached gingiva
parakeratinized
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What does perakeratinized masticatory mucosa protect against? (3)
- bacterial invasion
- mechanical irritation
- dryness
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In what type of oral mucosa are sutures rarely needed after surgery?
masticatory mucosa
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true or false. Injections are more difficult to give in masticatory mucosa. Masticatory mucosa has a longer healing time
both statements are true
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What might happen to non-keratinized oral mucosa if it is hyperkeratinized?
it may transform into keratinized
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Give an example of non keratinized epithelium being hyperkeratinized and transformed into keratinized.
Linea alba
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Linea alba occurs as a result of what?
masticatory habits
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Hyperkeratinization often occurs in response to what?
trauma
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true or false. In keratinized epithelium, hyperkeratinization may still occur in response to chemical trauma
true
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What are examples of trauma where keratinized oral mucosa can be hyper keratinized?
heat from smoking or hot fluids
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true or false. Hyperkeratinization in keratinized mucosa is reversible if the source of trauma is removed
true
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Where is specialized mucosa found? Give an example
- dorsal and lateral surfaces of the tongue
- papilla on tongue
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Labial and buccal mucosa is found where?
inner lips and cheeks
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What are 5 characteristics of labial and buccal mucosa?
- extremely thick
- opaque pink
- shiny, moist
- compressible
- stretches easily
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In labial and buccal mucosa the mucosa and muscle function as____ ____
one unit
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Alveolar mucosa is found where?
lines vestibules of oral cavity
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What are 5 characteristics of alveolar mucosa?
- thin tissue
- reddish pink
- mobile tissue
- shiny, moist
- loose attachment
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What are 5 characteristics of the floor of the mouth and ventral surface of the tongue mucosa?
- extremely thin tissue
- reddish pink
- moist shiny
- mobility
- function as one unit
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What are 3 characteristics of attached gingiva?
- opaque pink with pigmentation
- stippling
- mucogingival junction
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What does the attached gingiva look like when the stippling goes away?
smooth and shiny
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What are 2 characteristics of the hard palate?
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Which portion of the hard palate is more firm, the medial or lateral portion?
medial
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where is the tissue usually taken from for tissue grafting?
the hard palate
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What are 2 types of tissue grafting?
- gree gingival graft
- subepithelial graft
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