Oral Structures

Question 1

Oral mucous membrane

Answer 1

Stratified squamous epithelium (non-keratinized)

Question 2

Lip and cheek structure

Answer 2

External surface keratinized stratified squamous, vermillion zone, internal surface

Question 3

Vermilion Zone

Answer 3

Red area of lips. Transition between keratinized

and non-keratinized epithelium

Question 4

Incisors

Answer 4

8 teeth, single root

Question 5

Canine

Answer 5

4 for grasping, single root

Question 6

Premolars

Answer 6

8 for grinding, 2 roots

Question 7

Molars

Answer 7

12 for grinding, 2 or 3 roots

Question 8

Number of teeth

Answer 8

20 deciduous teeth, 32 permanent teeth

Question 9

Tooth structure

Answer 9

Crown (exposed) and root (in socket)

Question 10

Enamel

Answer 10

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

Question 11

Dentin

Answer 11

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

Question 12

Periodontal ligament

Answer 12

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

Question 13

Root canal

Answer 13

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

Question 14

Cementum

Answer 14

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

Question 15

Plaque

Answer 15

Film of sugar, bacteria, and debris

Question 16

Odontoblast

Answer 16

Give rise to predentin then dentin

Question 17

Pulp cavity in tooth

Answer 17

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

Question 18

Ameloblast

Answer 18

Produce the enamel

Question 19

Predentin

Answer 19

Organic matrix on dentin

Question 20

Sharpay’s fibers (dental)

Answer 20

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

Question 21

Alveolar processes

Answer 21

Alveolar bone that forms sockets for dental roots

Question 22

Gingiva

Answer 22

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

Question 23

Dental papilla (mesoderm)

Answer 23

Forms dentin related structures and pulp

Question 24

Mesenchyme (dental sac)

Answer 24

Forms cementoblasts and periodontal ligament

Question 25

4 stages of tooth development

Answer 25

bud, early cap, late cap, and bell stage

Question 26

Hard palate

Answer 26

keratinized mucosa and numerous salivary glands

Question 27

Soft palate

Answer 27

Large number of taste buds, and the uvula

Question 28

Specialized areas of tongue

Answer 28

articulation, mastication, taste, swallowing (deglutition), suckling

Question 29

Filiform

Answer 29

Located on the surface of tongue. Must numerous papillae, cone shaped and don’t have taste buds. Keratinized epithelium.

Question 30

Fungiform

Answer 30

Located on tip of tongue, contain a few taste buds, mushroom shaped. They are less numerous.

Question 31

Circumvallate

Answer 31

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.

Question 32

Taste buds

Answer 32

Located within the moat’s base/wall of tongue. Stratified squamous. Contain gustatory cells lined by microvilli (receptors) that project through taste pores

Question 33

Sections of the tongue

Answer 33

Oral (anterior) and pharyngeal (posterior)

Question 34

Lingual tonsils

Answer 34

Aggregates of lymphoid nodules located on the pharyngeal portion of the tongue. Contain minor salivary glands.

Question 35

Major salivary glands

Answer 35

encapsulated, secrete on demand

Question 36

Minor salivary glands

Answer 36

not encapsulated, continuous secretion

Question 37

Sensory cells (tongue)

Answer 37

Stain light

Question 38

Supporting cells (tongue)

Answer 38

Stain dark

Question 39

Salivary secretion

Answer 39

primary secretion by acini with striated ducts of columnar cells, active electrolyte transport

Question 40

Parasympathetic secretory control (salivary)

Answer 40

large amounts of watery secretions

Question 41

Sympathetic secretory control (salivary)

Answer 41

thick viscoid secretion (dry mouth)

Question 42

Paratoid glands

Answer 42

Compound acinar. Largest salivary glands (next to ear), serous glands, encapsulated.

Question 43

Submandibular glands

Answer 43

Compound tubulo-acinar. Serous demilune glands predominate over some mucous. Less prominent intercalated ducts. Produces the most saliva

Question 44

Sublingual glands

Answer 44

Compound tubulo-acinar. Unencapsulated, mucous glands predominate over serous, rare striated ducts, no intercalated ducts, and no fat. Produces the least amount of saliva

Question 45

Oropharynx

Answer 45

Conducts food from oral cavity to esophagus. Stratified squamous epithelium (non-keratinized).

Question 46

Nasopharynx

Answer 46

Conducts air from the nasal cavities to the larynx and trachea. Pseudostratified ciliated columnar epithelium.

Question 47

Stenson’s duct

Answer 47

Parotid excretory duct that opens on inner surface of cheek across from upper second molars

Question 48

Wharton’s duct

Answer 48

Submandibular ducts that open on the floor of the mouth

Question 49

Bartholin’s duct

Answer 49

Sublingual ducts that have multiple ducts that open posteriorly to the submandibular ducts

Question 50

Bud phase

Answer 50

Ectoderm origin, forms the enamel

Question 51

Cap phase

Answer 51

Mesenchyme origin, forms the dental papilla which forms dentin

Question 52

Bell phase

Answer 52

Mesenchyme origin, forms the dental sac which becomes the periodontal ligament and cementum