oral cavity II

Question 1

oral cavity boundaries

Answer 1

1) superior
- hard and soft palate
2) inferior
- mylohyoid muscle
3) posterior
- oropharyngeal isthmus
4) anterior
- opening of the mouth
5) lateral
- buccal cavity

Question 2

buccal cavity

Answer 2

1) medial
- maxilla
- mandible
2) lateral
- buccinator
- cheeks

Question 3

pterygomandibular raphe

Answer 3

1) constrictor and buccinator join it together

Question 4

mandible

Answer 4

1) mandibular notch
2) coronoid process
3) mylohyoid groove
4) mylohyoid line
5) superior and inferior mental spine

Question 5

basal bone

Answer 5

1) major parts of osseous tissue of mandible and maxillae except the alveolar processes
2) larger than alveolar bone
3) height increases with age
4) structure of dental skeletal
5) basal bone begins to develop in the fetus

Question 6

alveolar bone

Answer 6

1) alveolar bone is the bone that lines alveolus
2) thin plate of bone
3) alveolar bone can be resorbed with age
4) alveolar bone supports the tooth

Question 7

mylohyoid origin

Answer 7

1) mylohyoid line on medial aspect of the mandible

Question 8

mylohyoid insertion

Answer 8

1) posterior fibers are inserted into the body of the hyoid bone
2) anterior fibers are inserted into the fibrous raphe

Question 9

mylohyoid innervation

Answer 9

1) mylohyoid nerve from inferior alveolar nerve

Question 10

genioglossus innervation

Answer 10

1) CN XII
2) attaches to superior mental spine

Question 11

geniohyoid innervation

Answer 11

1) cervical spinal nerve 1

Question 12

digastric muscle

Answer 12

1) posterior belly
- CN VII
2) anterior belly

Question 13

salivary glands

Answer 13

1) parotid
2) submandibular
3) sublingual

Question 14

acinar cell structure

Answer 14

1) serous acinar cell
- enzymes and low molecular weight
2) mucous acinar cell
- high molecular weight glycoprotein (mucins)

Question 15

parotid glands

Answer 15

1) branches of VII
2) transverse facial artery
3) purely serous
4) opening into oral cavity into maxillary 2nd molar
- passes over buccinator

Question 16

parotid gland innervation

Answer 16

1) lesser petrosal => otic ganglion => post ganglionic parasympathetics travel with auriculotemporal nerve
- inferior salivatory nucleus
2) CN IX carries taste from posterior 1/3 of tongue

Question 17

submandibular glands

Answer 17

1) wraps around mylohyoid muscle
2) opening into the sublingual papilla
- on sides of lingual frenum
3) mostly serous (mixed)

Question 18

sublingual glands

Answer 18

1) floor of the oral cavity
2) sublingual fold in floor of mouth
3) mostly mucous (mixed)

Question 19

Blood supply to submandibular

Answer 19

1) facial artery
- submental branch

Question 20

blood supply to sublingual

Answer 20

1) sublingual branch of lingual artery
2) submental branch of facial artery

Question 21

parasympathetics to the glands

Answer 21

1) chorda tympani synapses in submandibular ganglion (GVE and SS)
2) then the postganglionic parasympathetics reach out the salivary glands

Question 22

great petrosal nerve

Answer 22

1) sphenopalatine / pterygopalatine ganglion
2) travel to hard and soft palate, nasal cavity, lacrimal gland
3) preganglionic parasympathetics in superior salivatory nucleus
- for CN VII
- great petrosal and parotid gland
4) GVE and SS

Question 23

nerve of pterygoid canal

Answer 23

1) great petrosal
- parasympathetic
2) deep petrosal
- sympathetic

Question 24

lingual nerve and submandibular duct cross each other

Answer 24

1) floor of the mouth
2) very caution with this area
3) superior mental spine

Question 25

tongue

Answer 25

1) body and root 2) all of papilla in anterior 2/3

Question 26

muscles of the tongue

Answer 26

1) genioglossus - protrusion 2) hyoglossus - depression 3) styloglossus - retraction *CN XII for above 4) palatoglossus - elevate -CN X (XI via X)

Question 27

intrinsic muscles of the tongue

Answer 27

1) superior longitudinal 2) inferior longitudinal 3) transverse 4) vertical *CN XII

Question 28

motor innervation of tongue

Answer 28

1) CN XII except palatoglossus

Question 29

sensory innervation to tongue

Answer 29

1) lingual nerve (CN V3) - anterior 2/3 2) CN IX - posterior 1/3 3) small areas just anterior to epiglottis - CN X

Question 30

special sensory to tongue

Answer 30

1) anterior 2/3 - chorda tympani of CN VII 2) circumvallate - CN IX 3) posterior 1/3 - CN IX 4) small area anterior to epiglottis - CN X

Question 31

squamous cell carcinoma

Answer 31

1) wait 2 weeks and if it doesn't go away, BIOPSY 2) drain neoplastic cells in lymph nodes deep to SCM along carotid sheath

Question 32

where to find CN IX

Answer 32

1) tonsillar bed 2) carries taste and general sensation to posterior 1/3 - circumvallate papilla - oropharynx

Question 33

where to find XII

Answer 33

1) submandibular triangle to innervate tongue muscles - except palatoglossus

Question 34

blood supply to the tongue

Answer 34

1) lingual artery - deep lingual (tip of tongue) - sublingual (floor of mouth) - dorsal lingual (posterior 1/3 of tongue)

Question 35

venous drainage of tongue

Answer 35

1) ranin vein - union of submandibular and deep lingual vein 2)dorsal lingual vein 3) varicosities can be present in oral cavity

Question 36

anatomical relationship of hypoglossal nerve and lingual artery

Answer 36

1) both are on either side of the hyoglossus

Question 37

upper teeth and gums

Answer 37

1) maxillary nerve - posterior superior alveolar (buccal gingiva and molars) 2) infraorbital nerve - middle superior alveolar (premolars) - anterior superior alveolar (anterior teeth) - superior labial (branch of infraorbital) 3) pterygopalatine / sphenopalatine ganglion - greater palatine - nasopalatine

Question 38

greater palatine

Answer 38

1) palatal gingiva from bicuspid to posterior

Question 39

nasopalatine

Answer 39

1) palatal gingiva from canine to canine

Question 40

mandibular nerve

Answer 40

1) inferior alveolar - all mandibular teeth 2) lingual - lingual gingiva to floor of mouth and anterior 2/3 of tongue - be careful not to approach lingual plate of bone with extraction 3) long buccal - facial gingiva of lower molar

Question 41

sphenomanidbular ligament

Answer 41

1) tendinous tissue 2) hides the nerves behind the lingula

Question 42

path of needle insertion for INF alveolar nerve

Answer 42

1) height - above occlusal plane of area of insertion - touch coronoid notch with finger - lateral to pterygomandibular raphe - touch the lingula of bone and back up 1 mm - aspirate 2) depth - 5-6 mm above

Question 43

CNVII

Answer 43

1) motor root - facial expression 2) nervus intermedius - parasympathetic and taste 3) geniculate ganglion - for taste fibers