Oral Cavity

Question 1

What does through the mandibular foramen?

Answer 1

Inferior alveolar n. and vessels

Question 2

What is found in the sublingual fossa?

Answer 2

sublingual gland

Question 3

What is found in the submandibular fossa?

Answer 3

Submandibular gland

Question 4

The hard palate consists of what?

Answer 4

1. Maxillary bone: sockets for teeth included
2. Palatine bone

Question 5

What does the hard palate do?

Answer 5

Separates the oral cavity from the nasal cavity

Is needed for creating suction

Question 6

What is Orofacial Celfting?

Answer 6

Either a cleft lip or cleft palate in children. This defect can make it hard to create suction for drinking

Question 7

How many teeth (and what types) do we have as children and adults?

Answer 7

Children: 8 incisors, 4 canines, and 8 molars

Adults: 8 incisors, 4 canines, 8 bicuspids, 8 molars, and 4 third molars

Question 8

What innervates the teeth?

Answer 8

Molars (V2): Posterior superior alveolar n.
Bicuspids (V2): middle superior alveolar n. (from infraorbital n.)
Canines and incisors (V2): anterior superior alveolar n. (from infraorbital n.)
Mandibular teeth (V3): Inferior alveolar n.

Question 9

What innervates the gums of the mouth?

Answer 9

Superior Gums: Multiple branches of V2
Buccal surface: Infraorbital nerve and branches of superior alveolar n.
Glossal/palatal surface: nasopalatine nerve and greater/lesser palatine nerve

Inferior Gums: Mandibular n. (V3)

Question 10

What does the oral cavity consist of?

Answer 10

Vestibule: space bounded by teeth/gums and lips/cheeks
Oral cavity proper: space bounded by dental arches

Question 11

What are the boundaries of the oral cavity?

Answer 11

Roof: Hard/soft palate
Floor: mylohyoid and geniohyoid
Lateral: Cheek
Anterior: Lips
Posterior: palatoglossal folds

Question 12

What is contained in the oral cavity?

Answer 12

Teeth
Tongue
Sublingual and submandibular glands
Nerves, lymphatics, and vessels

Question 13

What is a sore throat?

Answer 13

Infected or inflamed mucosal lining of the oropharynx

Question 14

What supplies blood and innervation posterior to the incisor teeth?

Answer 14

Nasopalatine n. and sphenopalatine a. (branches of maxillary n. and a.)

Question 15

What supplies blood and innervation to principle portion of hard palate?

Answer 15

Greater Palatine n. and a. (Branches of maxillary nerve and descending palatine artery)

Question 16

What supplies blood and innervation to the soft palate?

Answer 16

Lesser palatine n. and a.

Question 17

What does the soft palate consist of?

Answer 17

Fibromuscular tissue and mucous glands

Question 18

What does the soft palate do?

Answer 18

Depresses during chewing to keep food in oral cavity but elevates during swallowing to seal off nasopharynx from oropharynx

Question 19

The soft palate contains 5 pairs of skeletal muscles…what are their innervations?

Answer 19

4 of them will be CN X

1 of them will be CN V3

Question 20

If the vagus nerve is damaged, what would be a sign in th oral cavity?

Answer 20

Soft palate will appear asymmetric (lower on side of lesion). Uvula will deviate to opposite side of lesion.

Question 21

What nerves control the gag reflex?

Answer 21

Sensory: Glossopharyngeal
Motor: Vagus

Question 22

Where is a potential site for ingested object to get stuck?

Answer 22

Valleculae (between the median and lateral glossoepiglottic folds)

Question 23

What makes up the tonsillar ring?

Answer 23

Two Tubal Tonsils, Two Palatine Tonsils, one pharyngeal tonsil (adenoid) and one lingual tonsil

Question 24

What do tonsils do?

Answer 24

Lymphoid masses that serve as antigen-sampling devices to assist in immunological surveillance

Question 25

What are the boundaries of the palatine tonsil?

Answer 25

palatoglossal and palatopharyngeal folds

Question 26

What are Tonsillar Infections?

Answer 26

Typically, unilateral complication due to tonsilitis (poor response to antibiotics)

Uvula is pushed to opposite side and mouth is wide open

*Can have the potential to infect the retropharyngeal space.

Question 27

What is the retropharyngeal space?

Answer 27

The space behind the pharynx that can have abscesses which is a medical emergency due to it traveling all the way down the body

Question 28

The floor of the oral cavity consist of what?

Answer 28

Frenulum of tongue
Sublingual caruncle: opening of the submandibular duct
Sublingual fold and duct opening

Question 29

Where is the most common site for salivary stones?

Answer 29

Sublingual caruncle

Question 30

What does the mucous membrane of the ventral surface of the tongue do?

Answer 30

Facilitates rapid absorption of drugs

Question 31

What are the boudneries of the floor od the oral cavity?

Answer 31

mylohyoid and geniohyoid

Question 32

The submandibular duct crosses the lingual nerve, which one is one top?

Answer 32

Submandibular duct

Question 33

What innervates the mylohyoid?

Answer 33

Nerve to mylohyoid

Question 34

What innervates the geniohyoid?

Answer 34

C1 branches via CN XII

Question 35

What is the purpose of the mylohyoid and geniohyoid?

Answer 35

When jaw is closed, elevate the floor of the mouth and tongue during swallowing.