WEEK 9

Question 1

What forms the roof of the oral cavity?

Answer 1

hard and soft palate

Question 2

What forms the lateral boundary of the oral cavity

Answer 2

buccal mucosa (cheeks)

Question 3

What forms the anterior wall of the oral cavity?

Answer 3

oral fissure and lips

Question 4

what forms the posterior wall of the oral cavity

Answer 4

fauces (oropharyngeal isthmus) which opens into the oropharynx

Question 5

the lips are mainly formed by

Answer 5

obicularis oris

Question 6

what are the functions of the lips

Answer 6

valves of the oral fissure with the muscle acting as a sphincter
articulation of sound and speech

Question 7

what is the labial frenulum

Answer 7

free edged folds of mucous membranes which connect the lips to the gingivae for mobility

Question 8

what forms the prominence of the cheek?

Answer 8

zygomatic bone

Question 9

what is the fauces?

Answer 9

communication between the oral cavity and oropharynx

Question 10

What is the lateral boundary of the fauces

Answer 10

palatoglossal and palatopharyngeal arches

Question 11

what is the superior boundary of the fauces?

Answer 11

soft palate

Question 12

what is the inferior boundary of the fauces?

Answer 12

roof of the tongue

Question 13

what are the two divisions of the oral cavity?

Answer 13

oral cavity proper and vestibule

Question 14

What is the pathway of the maxillary branch of the trigeminal nerve

Answer 14

exits the cranial cavity through the foramen rotundum and enters the pterygopalatine fossa. it exits by transversing the inferior orbital fissure and it enters the orbit where it continues as the infraorbital nerve.

Question 15

what are the indirect branches of the maxillary nerve (branches from pterygopalatine ganglion)

Answer 15

greater palatine nerve, lesser palatine nerve, nasopalatine nerve

Question 16

what does the greater palatine nerve innervate

Answer 16

Mucosa of hard and soft palate

Question 17

what does the lesser palatine nerve innervate

Answer 17

Mucosa of soft palate

Question 18

What does the nasopalatine nerve innervate?

Answer 18

hard palate and nasal cavity

Question 19

what are the relevant branches of the maxillary nerve

Answer 19

posterior middle and anterior superior alveolar nerves, ganglionic branches from pterygopalatine ganglion, infraorbital nerve, zygomatic nerve

Question 20

what does the posterior superior alveolar nerve innervate?

Answer 20

3 maxillary molar teeth

Question 21

what does the middle superior alveolar nerve innervate?

Answer 21

maxillary pre molars and first molar

Question 22

what does the anterior superior alveolar nerve innervate?

Answer 22

maxillary canines and incisors

Question 23

what are the branches of the mandibular division of the trigeminal nerve?

Answer 23

lingual, buccal, chorda tympani (branch of facial), auriculotemporal, inferior alveolar

Question 24

what is the pathway of the mandibular division of the trigeminal nerve?

Answer 24

enters the infratemporal fossa from the foramen ovale

Question 25

what does the buccal branch innervate?

Answer 25

sensory info from mucosa of the cheek

Question 26

what does the auriculotemporal branch innervate?

Answer 26

sensory info from skin of anterior scalp, it also provides a route for autonomic fibres to reach the parotid gland

Question 27

what does the inferior alveolar nerve innervate?

Answer 27

mandibular teeth, mylohyoid muscle and anterior belly of digastric

Question 28

what is the path of the inferior alveolar nerve

Answer 28

before entering the mandibular canal it gives off the motor branch to mylohyoid innervating the anterior belly of digastric and mylohyoid. it emerges from mental foramen and continues as mental nerve that innervates skin of the chin.

Question 29

what is the clinical relevance of the pterygomandibular raphe

Answer 29

used as a guide to anaesthetize the inferior alveolar nerve and therefore all the lower teeth

Question 30

what is the sphenomandibular ligament

Answer 30

connects the sphenoidal spine to the medial side of the ramus

Question 31

which branch of the mandibular nerve innervates the TMJ

Answer 31

auriculotemporal

Question 32

what are the functions of the lingual nerve

Answer 32

sensory info from anterior 2/3 of tongue taste sensation of anterior 2/3 of tongue autonomic fibres to submandibular and sublingual glands

Question 33

what is the function of the inferior alveolar nerve

Answer 33

sensory info on chin, innervate all lower teeth

Question 34

what are the 3 functions of auriculotemporal nerve

Answer 34

innervate skin of anterior scalp route for autonomic fibres to reach parotif salivary gland sensory info from TMJ

Question 35

what nerve gives sensory info from mucosa of lower lip, cheecks, teeth, gingiva and floor of the mouth?

Answer 35

mandibular

Question 36

which nerve gives sensory info from mucosa of upper lip, cheeks, teeth, gingiva and roof?

Answer 36

maxillary

Question 37

which nerve gives sensory info from boundaries of fauces?

Answer 37

glossopharyngeal

Question 38

what branches of the maxillary artery supply the oral cavity?

Answer 38

inferior alveolar artery buccal artery posterior superior artery infraoribital artery descending palatine artery

Question 39

what does the inferior alveolar artery supply?

Answer 39

mandible, mandibular teeth, mylohyoid

Question 40

What does the buccal artery supply?

Answer 40

buccal mucosa

Question 41

what does the posterior superior alveolar artery supply

Answer 41

maxillary molar, premolar teeth, and gingiva

Question 42

what does the infraorbital artery supply?

Answer 42

maxillary canines and incisors (through the anterior superior alveolar branch)

Question 43

what does the descending palatine artery supply?

Answer 43

mucosa and glands of soft and hard palate

Question 44

which veins are tributaries of the pterygoid venous plexus

Answer 44

posterior superior and inferior alveolar veins, infraorbital veins, buccal veins

Question 45

what are the superficial tissues of lymphatic drainage

Answer 45

cheek, upper lip, lower lip, mucosa of floor of mouth, tip of tongue

Question 46

where does the cheek and upper lip drain into

Answer 46

submandibular and sometimes buccal lymphnodes first

Question 47

where does the lower lip drain into

Answer 47

submandibular and submental lymph nodes

Question 48

where does the mucosa of the mouth and tip of tongue drain into

Answer 48

submental nodes

Question 49

where does the gingiva drain into

Answer 49

submandibular lymph nodes

Question 50

where do the teeth drain into

Answer 50

mandibular incisors submental and all other teeth submandibular lymph nodes

Question 51

where does the rest of the tongue drain into

Answer 51

directly to nodes of deep chain (except for centre dorsum of tongue)

Question 52

Function + structure of the hard palate

Answer 52

Made up of bone + covered with a layer of keratinized squamous epithelium This creates a strong rigid structure for the roof of the oral cavity allowing the tongue to press food against it to push food towards the teeth for the further breakdown or manipulate the bolts before swallowing

Question 53

Function + structure of soft palate

Answer 53

Made up of skeletal muscle (therefore soft tissue) While swallowing will contract to close the nose pharynx preventing food or liquid from entering the nasal cavity