(1) Anatomy of the Oral Cavity

Question 1

Where is deglutition initaited?

Answer 1

mouth

Question 2

What are the two parts of the oral cavity?

Answer 2

Proper

Vestibule

Question 3

What cause diastema in children?

Answer 3

a large superior labial frenulun between the two maxillary incisors

Question 4

What is the effect of the large lower labial frenulum?

Answer 4

the large lower labial frenulum may pull the labial gingiva down to expose the teeth

Question 5

What forms the boundaries of the oral vestibule?

Answer 5

• between teeth and gingivae internally, and lips and cheeks externally
• Opens exteriorly through the oral fissure, and posteriorly with the oral cavity proper

Question 6

What froms the boundaries of the oral cavity proper?

Answer 6

• Internal to the dental arches
• The roof is formed by the palate
• Posteriorly it opens into oropharynx

Question 7

What occupies the oral cavity proper?

Answer 7

tongue

Question 8

What type of epithelium lines the oral cavity?

Answer 8

NKSS epithelium

Question 9

Where is the opening of the parotid duct located?

Answer 9

opposite to the upper 2^nd molar

Question 10

Where is the opening of the submandibular glands located?

Answer 10

in the sublingual papilla

Question 11

Sublingual absorption of drugs

Answer 11

absorbed in less than 1 minute into deep lingual veins

Question 12

What is found superior to the palate?

Answer 12

Nasal surface

Question 13

what type of epithelium lines the superior surface of the palate?

Answer 13

Nasal surface- pseudostratified columnar ciliated epithelium

Question 14

what type of epithelium lines the inferior surface of the palate?

Answer 14

Oral surface- NKSS

Question 15

What two bones form the hard palate?

Answer 15

1. Palatine process of the Maxilla bone
2. Horizontal plate of the Palatine bone

Question 16

what glands are found on the roof of the oral cavity?

Answer 16

Palatine glands [mucous secreting]

Question 17

What forms the palatine aponeurosis?

Answer 17

tendons of tensor palati muscles

Question 18

Where is the uvula found?

Answer 18

it hangs down from the middle of the posterior free border of the soft palate

Question 19

How is the soft palate connected to the tongue and pharynx?

Answer 19

by palatoglossal and palatopharyngeal arches, respectively

Question 20

Describe the changes of the soft palate during the different stages of the swallowing

Answer 20

Initially, it tenses, but then it elevates to block the nasopharynx to prevent the food from entering nasopharynx

Question 21

What neurovascular bundle supplies the soft palate?

Answer 21

Lesser palatine nerve and artery

Question 22

Boundaries of the Throat

Answer 22

Bounded above by the soft palate, below by the tongue, and on either side by isthmus of fauces formed by palatoglossal and palatopharyngeal arches

Question 23

What neurovascular bundle supplies the hard palate?

Answer 23

Greater palatine nerve & artery

Question 24

Greater palatine block

Answer 24

injected between the 2nd and 3rd molars

Question 25

Origin of the muscles of the soft palate

Answer 25

• Tensor palatini & levator palatini muscles originate from base of the skull & auditory tube (they’re above the soft palate)
• Palatoglossus & palatopharyngeus originate from the palate (they’re below soft palate)

Question 26

Innervation of the Tensor veli palatini

Answer 26

Question 27

Innervation of the muscles of the Soft Palate

Answer 27

• Tensor Veli Palatini: medial pterygoid nerve [branch of mandibular nerve] via otic ganglion
• Rest:: Pharyngeal branch of Vagis nerve via pharyngeal plexus