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66 Cards in this Set
- Front
- Back
What is the space between the lips, cheeks, and teeth?
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Vestibule
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What is included with the oral cavity proper?
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anything behind the teeth: hard and soft palates, tongue and floor of the mouth, entrance into the oropharynx
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What is the oral cavity superior?
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hard and soft palates
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What is included with the oral cavity proper, inferior?
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tongue and floor of the mouth
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What in included with the oral cavity proper, posterior?
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entrance into the oropharynx
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What are the two types of mucosa found in the oral cavity
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Masticatory and Lining Mucosa
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What mucosa includes a keratinized stratified squamous epithelium?
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Masticatory Mucosa
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Where is masticatory mucosa found?
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Gingiva and Hard Palate
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Why would you need keratinized st. sq. epithelium in the gingiva and hard palate?
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because of friction when chewing = the surface is more keratinzed for protection
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What type of tissue is found in lining mucosa?
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NON keratinized stratified squamous epithelium
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where is non kertainized st. sq. epithelium found in the oral cavity
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inner lips, floor of the mouth, inferior tongue, soft palate - so you can slip things right by!
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______ are elevations of mucosa found on the surface of the tongue.
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papillae
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What are the smallest and most numerous papillae found on the tongue?
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Filiform
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What papillae are conical, elongated and projections of CT with keratinized stratified sq. epithelial coverings?
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Filiform papillae
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T/F Filiform Papillae contain taste buds.
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False
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What do filiform papillae mainly provide?
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friction
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What papillae are taller than filiform, scattered, just visible to the naked eye, more numerous near the tip, and appear as red dots on the tongue?
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Fungiform papillae
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T/F fungiform papillae contain taste buds
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True
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Why do fungiform papillae appear as red dots on the tongue?
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highly vascularized
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What papillae are large, dome-shaped structures just anterior to the sulcus terminalis?
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Circumvallate papillae
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How many circumvallate papillae are present in humans?
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8-10
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What papillae is surrounded by invagination containing serous (von Ebner's) glands that flush material from the gland?
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circumvallate
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What purpose do the large invaginations surrounding circumvallate papillae have?
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when material is flushed it allow the taste buds to respond quickly to stimuli
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T/F circumvallate papillae have taste buds
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True
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what papillae have parallel low ridges separated by clefts?
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Foliate papillae
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Where are foliate papillae found on the tongue?
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lateral edges of the tongue
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Do foliate papillae have taste buds?
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yes
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T/F All papillae have taste buds
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False - filiform don't have taste buds
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What are found along the lateral walls of circumvallate papillae within the clefts?
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taste buds
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What neuroepithelial structure is oval, onion-shaped with a structure of 50-100 cells?
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taste bud
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how often are the neuroepithelial sensory cells replaced?
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every 10 days
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What is found at the surface of the taste buds?
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Microvilli
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The base of taste budssynapse with _______ ________ neurons of the ___,___,___nerves are found.
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afferent sensory, VII (facial), IX (glossopharyngeal), X (vagus
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What 3 cells are found within a taste bud?
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Supporting cell and Basal Cell, and neuroepithelial (sensory cells)
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what cell within the taste bud looks similar to neuroepithelial cells but do not synapse with the neurons and turn over every 10 days?
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Supporting cells
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______ is a small stem cell at the base of a taste bud.
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Basal Cells
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What percentage of dentin is calcified material?
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70%
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What type of collage is richly found in predentin?
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Collage I
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What structure is the tooth mainly composed of?
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dentin
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What cells produce dentin?
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odontoblasts
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What is the origin of odontoblasts?
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Mesenchymal - Neural Crest Cells in the dental papillae during embryological development
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What are apical extension through the dentin found inside the dentinal tubules?
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odontoblast processes (tomes fibers)
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What is the acellular material found within teeth?
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enamel
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What is derived from ameloblasts?
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enamel
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Where do ameloblasts originate?
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from ectoderm
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Once enamel is formed, can it be replaced?
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NO
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What is enamel composed of?
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rods/prisms that span the ENTIRE thickness of the enamel layer, and interrod enamel that binds the enamel rods together
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What is the pulp comprised of?
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Loose CT containing odontoblasts, fibroblasts, and collagen fibers
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What structure in the tooth is highly vascular and has a nerve supply?
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pulp
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Where doe the nerve and blood supply exit/enter the tooth?
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apical foramen
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What is supporting the teeth and maintaining structures in the maxilla and mandible?
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Periodontium
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What covers root dentin?
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Cementum
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What cell creates cementum and what is it's embryonic origin?
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Cementoblasts, mesenchymal origin
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What is the periodontal ligament derived from?
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mesenchyme surrounding the cementum
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T/F the fibers from the periodontal ligament penetrate into the cementum
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True
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T/F the fibers from the periodontal ligament have a high turn-over rate
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True
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What is the purpose of the periodontal ligament?
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bind the root to the socket and absorb the pressure (evenly distribute the pressure)
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what structures are responsible for supporting teeth and maintaining structure in the bone?
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cementum and periodontal ligament, alveolar bone, and gingiva
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what is in direct contact with the periodontal ligament?
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alveolar bone
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what is the specialized oral mucosa around the neck of the tooth?
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gingiva (masticatory mucosa)
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T/F the gingiva is firmly attached to the teeth and alveolar bone
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True
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what is the specialized part of the gingiva bound to the tooth enamel?
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junctional epithelium
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What binds the gingiva to the tooth enamel?
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hemidesmosomes
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what is the small deepening up to 3mm surrounding the cervix of the crown?
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gingival sulcus (not bound)
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what is the epithelial attachment comprised of?
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hemidesmosomes and basal lamina
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hemidesmsome and basal lamina bind the gingiva to the enamel is called
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epithelial attachment
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