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what is the tissue that lines the oral cavity?
oral mucosa
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what are the three general layers of the oral mucosa?
- epithelium
- basement membrane
- lamina propria
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lamina propria is the new name for the ______ _____ _____ and what are its four layers?
- connective tissue proper
- papillary layer
- capillary plexus
- dense layer
- submucosa
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loose connective tissue with fingerlike projections into the overlying epithelium
papillary layer part of the lamina propria
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capillary system that runs between the two layers and sends more capillaries up into each papilla?
capillary plexus part of the lamina propria
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dense connective tissue
dense layer part of the lamina propria
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may or may not be present deep to the dense layer, and what can it be composed of?
- Submucosa
- adipose tissue
- saliva glands
- muscle
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if _______ is not present the connective tissue connects directly to the ______.
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if the submucosa connects to bone it becomes ________
mucoperiosteum
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what are the three different ways oral mucosa can be classified?
- lining mucosa
- masticatory mucosa
- specialized mucosa
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lining mucosa
softer surface teture, moist, and able to stretch/compress
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masticatory mucosa
rubbery surface texture and resilient
-
specialized mucosa
lingual papillae
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nonkeratinized stratified squamous epithelium is found in ______ ______
lining mucosa
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the ________ ________ _______ ______ is the most common in the oral cavity
nonkeratinized stratified squamous epithelium
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what are the three layers of the nonkeratinized stratified squamous epithelium
- basal layer
- intermediate layer
- superficial layer
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the basal layer is?
the deepest layer, a single layer of cells that sits above the basement membrane
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what are the two functions of the basal layer?
- produce the lamina lucida of the basement membrane
- produce new epithelial cells by mitosis
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where does mitosis take place in the nonkeratinized stratified squamous epithelium
basal layer
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what is the intermediate layer
middle layer, cells have migrated superficially from the basal layer
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what makes up the bulk of the nonkaratinized stratified squamous epithelium?
intermediate layer
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what is the superficial layer?
top layer, cells have continued to migrate and they have gotten flatter as they move up, now they are squames
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what shed and die in the nonkeratinized stratified squamous epithelium?
superficial layer-squames die and are shed from tissue
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what are the three types of epithelium of the oral mucosa?
- nonkeratinized stratified squamous epithelium
- orthokeratinized stratified squamous epithelium
- parakeratinized stratified squamous epithelium
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where is orthokeratinized epithelium found?
masticatory mucosa
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what is the least common epithelium in the oral cavity
orthokeratinized stratified squamous epithelium
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what are the four layers of the orthokeratinized stratified squamous epithelium?
- basal layer
- prickle layer
- granular layer
- keratin layer
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what is the prickle layer?
similar to intermediate layer makes up the bulk of the epithelium
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what is it called the prickle layer?
when it is dried the cells shrink but maintain their desmosomes
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what is the grandular layer?
similar to the intermediate layer, cells have keratohyaline granules that eventually keratinize the cell
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what doe the keratohyaline granules do?
keratinized the cell
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what is the keratin layer?
similar to the superior layer, migrated to the top, flattened out and filled with keratin, no nuclei
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what layer has no nuclei?
keratin layer of the orthokeratinized stratified squamous epithelium
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where is parakeratinized stratified squamous epithelium found?
masticatory mucosa
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_______is more common than orthokeratinized
parakeratinized
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_______ keratin cells have nuclei
parakeratinzed
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what kind of epithelium has nuclei?
parakeratinized
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what is stippling?
tall narrow papilla pulling on epithelium. Very healthy. (orange peel)
-
what is the mucogingival junction?
scalloped division between the attached gingiva and the alveolar mucosa
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what gives color to oral mucosa?
melanin pigmentation
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_____ ____ has a quick turnover time
oral mucosa
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what repairs the epithelium?
blood clot
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what repairs the connective tissue
granulation tissue
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too much _______ ____ can cause problems and may have to be removed
granulation tissue
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