Lip, Mouth & Palate

Question 1

The substance of the lips is made up by

Answer 1

the orbicularis oris muscle and the muscles that radiate from the lips into the face

Question 2

philtrum of lip

Answer 2

the shallow vertical groove seen in the midline on the outer surface of the upper lip

Question 3

which structure connects the inner surface of the lips to the gums?

Answer 3

labial frenulae

Question 4

The mouth extends from

Answer 4

lips to the pharynx

Question 5

oropharyngeal isthmus

Answer 5

• entrance into the pharynx

- formed on each side by the palatoglossal fold

Question 6

mouth is divided into

Answer 6

vestibule and mouth cavity proper

Question 7

vestibule

Answer 7

The vestibule lies between the lips and the cheeks externally and the gums and the teeth internally

Question 8

roof of mouth proper

Answer 8

The roof of the mouth is formed by the hard palate in front and the soft palate behind

Question 9

Floor of Mouth

Answer 9

The floor is formed largely by the anterior two thirds of the tongue and by the reflection of the mucous membrane from the sides of the tongue to the gum of the mandible.

Question 10

sensory innervation of roof

Answer 10

The greater palatine and nasopalatine nerves from the maxillary division of the trigeminal nerve

Question 11

sensory innervation of floor

Answer 11

The lingual nerve (common sensation), a branch of the mandibular division of the trigeminal nerve.

The taste fibers travel in the chorda tympani nerve, a branch of the facial nerve.

Question 12

sensory innervation of cheek

Answer 12

The buccal nerve, a branch of the mandibular division of the trigeminal nerve (the buccinator muscle is innervated by the buccal branch of the facial nerve)

Question 13

lingual nerve is in close relation with

Answer 13

lower third molar tooth

Question 14

deciduous teeth

Answer 14

There are 20 deciduous teeth

• four incisors, two canines, and four molars in each jaw
• erupt between 6months - 2years of age

Question 15

permanent teeth

Answer 15

• There are 32 permanent teeth: 4 incisors, 2 canines, 4 pre- molars, and 6 molars in each jaw
• begin erupting at 6 yrs of age

Question 16

The last tooth to erupt is?

Answer 16

the third molar, which may happen between the ages of 17 and 30

Question 17

hard palate is formed by?

Answer 17

• the palatine processes of the maxillae

- the horizontal plates of the palatine bones

Question 18

soft palate is composed of?

Answer 18

mucous membrane
palatine aponeurosis
muscles

Question 19

Palatine Aponeurosis

Answer 19

The palatine aponeurosis is a fibrous sheet attached to the posterior border of the hard palate. It is the expanded tendon of the tensor veli palatini muscle.

Question 20

Muscles of the Soft Palate

Answer 20

tensor veli palatini, the levator veli palatini, the palatoglossus, the palatopharyngeus, and the musculus uvulae

Question 21

Nerve Supply of the Palate

Answer 21

• The greater and lesser palatine nerves
• nasopalatine nerve
• glossopharyngeal nerve

Question 22

Blood Supply of the Palate

Answer 22

• The greater palatine branch of the maxillary artery, -the ascending palatine branch of the facial artery,
• the ascending pharyngeal artery

Question 23

Lymph Drainage of the Palate

Answer 23

Deep Cervical Lymph Nodes

Question 24

Palatoglossal Arch

Answer 24

• a fold of mucous membrane containing the palatoglossus muscle, which extends from the soft palate to the side of the tongue
• The palatoglossal arch marks where the mouth becomes the pharynx.

Question 25

Palatopharyngeal Arch

Answer 25

a fold of mucous membrane behind the palatoglossal arch that runs downward and laterally to join the pharyngeal wall. The muscle contained within the fold is the palatopharyngeus muscle.

Question 26

which structure is located between the palatoglossal and palatopharyngeal arches?

Answer 26

palatine tonsils

Question 27

which structure is used during the production of explosive consonants in speech

Answer 27

The pharyngeal isthmus (the communicating channel between the nasal and oral parts of the pharynx) is closed by raising the soft palate.

Question 28

Angioedema of the Uvula (Quincke’s Uvula)

Answer 28

The uvula has a core of voluntary muscle, the musculus uvu- lae, that is attached to the posterior border of the hard palate. Surrounding the muscle is the loose connective tissue of the submucosa that is responsible for the great swelling of this structure secondary to angioedema.

Question 29

nerve supply of soft palate muscles

Answer 29

all muscles are supplied by pharyngeal plexus except tensor veli palatini which is supplied by Nerve to medial pterygoid from mandibular nerve