Oral Structures Flashcards

1
Q

Oral mucous membrane

A

Stratified squamous epithelium (non-keratinized)

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2
Q

Lip and cheek structure

A

External surface keratinized stratified squamous, vermillion zone, internal surface

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3
Q

Vermilion Zone

A

Red area of lips. Transition between keratinized

and non-keratinized epithelium

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4
Q

Incisors

A

8 teeth, single root

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5
Q

Canine

A

4 for grasping, single root

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6
Q

Premolars

A

8 for grinding, 2 roots

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7
Q

Molars

A

12 for grinding, 2 or 3 roots

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8
Q

Number of teeth

A

20 deciduous teeth, 32 permanent teeth

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9
Q

Tooth structure

A

Crown (exposed) and root (in socket)

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10
Q

Enamel

A

95% calcium salt (hydroxyapatite), hardest substance in body. Can not repair itself. Covers the crown of the tooth.

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11
Q

Dentin

A

Bulk of tooth, harder than bone because of the collagen and mineral (hydroxyapatite)

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12
Q

Periodontal ligament

A

It binds the cementum to spongy bone. Anchors tooth in boney socket of jaw.

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13
Q

Root canal

A

Central canal in the pulp of the root. Exit route for pulp cavity is through the apical foramen

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14
Q

Cementum

A

Bone like matrix that covers the root portion of dentin. and connects it to the periodontal ligament

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15
Q

Plaque

A

Film of sugar, bacteria, and debris

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16
Q

Odontoblast

A

Give rise to predentin then dentin

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17
Q

Pulp cavity in tooth

A

Inside of the dentin surrounded by odontoblast and contain blood vessels and nerves

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18
Q

Ameloblast

A

Produce the enamel

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19
Q

Predentin

A

Organic matrix on dentin

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20
Q

Sharpay’s fibers (dental)

A

Provides anchor sites for collagen bundles from the periodontal ligament to the cementum

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21
Q

Alveolar processes

A

Alveolar bone that forms sockets for dental roots

22
Q

Gingiva

A

Gums, firmly bound to the periosteum of the alveolar processes.

23
Q

Dental papilla (mesoderm)

A

Forms dentin related structures and pulp

24
Q

Mesenchyme (dental sac)

A

Forms cementoblasts and periodontal ligament

25
4 stages of tooth development
bud, early cap, late cap, and bell stage
26
Hard palate
keratinized mucosa and numerous salivary glands
27
Soft palate
Large number of taste buds, and the uvula
28
Specialized areas of tongue
articulation, mastication, taste, swallowing (deglutition), suckling
29
Filiform
Located on the surface of tongue. Must numerous papillae, cone shaped and don't have taste buds. Keratinized epithelium.
30
Fungiform
Located on tip of tongue, contain a few taste buds, mushroom shaped. They are less numerous.
31
Circumvallate
Large circular structures that contain a "moat" that secretes mucous. They are located at the back of the tongue and contain the most taste buds.
32
Taste buds
Located within the moat's base/wall of tongue. Stratified squamous. Contain gustatory cells lined by microvilli (receptors) that project through taste pores
33
Sections of the tongue
Oral (anterior) and pharyngeal (posterior)
34
Lingual tonsils
Aggregates of lymphoid nodules located on the pharyngeal portion of the tongue. Contain minor salivary glands.
35
Major salivary glands
encapsulated, secrete on demand
36
Minor salivary glands
not encapsulated, continuous secretion
37
Sensory cells (tongue)
Stain light
38
Supporting cells (tongue)
Stain dark
39
Salivary secretion
primary secretion by acini with striated ducts of columnar cells, active electrolyte transport
40
Parasympathetic secretory control (salivary)
large amounts of watery secretions
41
Sympathetic secretory control (salivary)
thick viscoid secretion (dry mouth)
42
Paratoid glands
Compound acinar. Largest salivary glands (next to ear), serous glands, encapsulated.
43
Submandibular glands
Compound tubulo-acinar. Serous demilune glands predominate over some mucous. Less prominent intercalated ducts. Produces the most saliva
44
Sublingual glands
Compound tubulo-acinar. Unencapsulated, mucous glands predominate over serous, rare striated ducts, no intercalated ducts, and no fat. Produces the least amount of saliva
45
Oropharynx
Conducts food from oral cavity to esophagus. Stratified squamous epithelium (non-keratinized).
46
Nasopharynx
Conducts air from the nasal cavities to the larynx and trachea. Pseudostratified ciliated columnar epithelium.
47
Stenson’s duct
Parotid excretory duct that opens on inner surface of cheek across from upper second molars
48
Wharton's duct
Submandibular ducts that open on the floor of the mouth
49
Bartholin's duct
Sublingual ducts that have multiple ducts that open posteriorly to the submandibular ducts
50
Bud phase
Ectoderm origin, forms the enamel
51
Cap phase
Mesenchyme origin, forms the dental papilla which forms dentin
52
Bell phase
Mesenchyme origin, forms the dental sac which becomes the periodontal ligament and cementum