Oral cavity

Question 1

the different parts of the oral cavity

Answer 1

• Oral vestibule
• oral cavity proper
• isthmus of fauces

Question 2

borders of oral vestibule

Answer 2

• bounded ant. and laterally by the lips and cheeks
• post. and medial by the teeth and gums
• above and below by the reflections of the mucous from the lips and cheeks to the gyms

Question 3

what is the oral cavity proper?

Answer 3

the space between the dental arches, limited posteriorly by the isthmus of fauces

Question 4

what are the borders of the oral cavity

Answer 4

• sup. (ant).hard palate, (post.) soft palate
• inf. muscular roof of the oral cavity, mylohyiod, and the 2 geniohyoid
• lat. teeth arches, cheeks formed by the buccinator m. and mucosa
• post. isthmus of fauces
• ant. lips

Question 5

what are the borders of the isthmus of fauces?

Answer 5

• sup. soft palate
• inf. root of tongue
• lat. palatoglossal and palatopharyngeal arches

Question 6

what is the mentolabial fold?

Answer 6

a groove from the chin to the lip

Question 7

what is the nasolabial fold?

Answer 7

a groove from the upper lip to the external nose

Question 8

what is the philtrum?

Answer 8

a groove that extends downwards from the nose over the midline of the upper lip

Question 9

what does the palate make up and it is composed of?

Answer 9

• the floor of nasal cavity and the roof of the oral cavity

- composed of a hard and soft palate

Question 10

the hard palate…

Answer 10

• makes up 2/3 of the of the palate anteriorly,
• composed of the palatine process and the horizontal plates of palatine bones
• has 3 foramina’s

Question 11

what are the 3 foramens in the hard palate?

Answer 11

• incisive fossa (2 foramens) contains nasopalatine nerves and incisive papilla
• greater palatine foramen has the grater palatin vessels and nerves
• lesser palatine contains the lesser palatine vein, nerves

Question 12

the soft palate….

Answer 12

makes up 1/3 of the palate and has 4 parts
ant- attached to the hard palate by the tendon of tensor veli palatini
post- contains the muscular palate
mid- uvula
lat- continues with the wall of the pharynx by palatoglossal and palatopharyngeal arches

Question 13

muscles of the soft palate

Answer 13

• tensor veli palatini (inn by a branch of the trigeminal)
• levator veli palatini
• palatoglossus
• palatopharyngeus
• muscular uvulae (inn by vagus n.)
• ** the rest is innervated by the glossopharyngeal n. (IV)

Question 14

arteriole supply of the soft palate?

Answer 14

• greater palatine a.
• branch of descending palatine a.
• lesser palatine a.

Question 15

innervation of the soft palate?

Answer 15

• greater palatine nerve
• naso palatine nerve
• lesser palatine nerve

Question 16

function of the salivary glands

Answer 16

• secretion of saliva which:
• lubricates food and start of starch digestion,
• prevents tooth decay,
• keeps mucosa membrane moist

Question 17

features of the parotid gland?

Answer 17

• purely serious

- largest, with tough fascial capsule called the parotid sheath

Question 18

where does the parotid gland lay?

Answer 18

inferior the the external acoustic meatus, behind the rammus of the mandible and infront of the styloid process

Question 19

the parotid duct of stensons

Answer 19

passes horizontally and at the ant. border of the masseter muscle and it pierves the buccinator muscle to open behind the 2nd maxillary molar into the oral cavity

Question 20

structures within the parotid gland

Answer 20

• parotid plxus of facial nerve branch
• reotromandibular vein
• external carotid artery and a branch which supply the gland
• auriculotemporal nerve
• parotid lymph node

Question 21

the submandibular gland….

Answer 21

• mostly serious
• bondy of the mandible duct is 5 cm long between mylohyoid and hyglossus muscle passing from lateral to medial,
• opens on a sublingual papillae
• supplied by the submental a. and vein

Question 22

the sunlingual gland….

Answer 22

• mostly mucous
• lies on the floor of the mouth between the mandible and genioglossus muscle, both glands unite to form a horse shoe shape under the lingual frenulum

Question 23

what is the arterial supply of the sublingual gland?

Answer 23

• sublingual a.

- submental a.

Question 24

borders of the parotid nest?

Answer 24

ant- mandible, masseter and medial pterygoid
post- external acoustic meatus cartilage, mastoid process, sternocleido mastoid,digastric m. (post)
med-styloid process, its muscles and int. jugular vein
innervated by the glossopharyngeal