oral cavity & submandibular region Flashcards
what is included in the oral region
oral cavity cheeks and lips teeth and gingivae tongue tonsils salivary glands palate
what makes up the oral cavity
oral cavity proper and vestibule
what are the boundaries of the oral cavity
lateral/anterior- teeth gums
superior- hard/soft palate
inferior- floor of mouth
posterior- fauces
what is the vestibule of oral cavity
space between lips/cheeks and teeth
opens externally at the oral fissure between lips
mm of facial expression controling shape and size of oral fissure
parotid duct opens into vestibule opposite to upper 2nd molar
What are the external and internal structure of lips
externally- covered by skin
internally covered by mucus membrane
what are the mm of facial expression
orbicularis oris levator labii superioris levator anglui oris zygomaticus risorius levator labii superioris alaeque nasi depressor anguli oris depressor labii inferioris mentalis
what mm controls frowning
depressor labii inferioris, anguli oris
what mm elevate the upper lip
levaor labii superioris
levator anguli oris
zygomaticus major and minor
levator labii superioris alaeque nasi
what m protrudes lower lip
mentalis
what m flares nostrils
levator labii superioris alaeque nasi
what m causes a wide smile
risorius
what inn the upper lip
V2 via infraorbital branches
what inn lower lip
v3 via mental and buccal branches
describe lymph drainage of oral cavity
submental lymph nodes from medial part lower lip
submandibular lymph from all other regions
How many teeth do we have
32 permanent 16 deciduous(baby teeth)
describe the names of teeth
incisors-4 canine-12 and premolars-4 molars-6
What is the gingivae
mucus membrane and fibrous tissue attached to the alveolar processes of the mandible and maxilla bones, also attached to neck of teeth
what inn the teeth
maxillary teet from superior alveolar branches of V2
mandibular teeth from inferior alveolar branches of V3
What inn the maxillary gingivae
palatine portion by nasopalatine and greater palatine n from V2
vestibular portion from superior alveolar branches of V2
what inn the mandicular gingivae
internal from lingual n V3
external from buccal and inferior alveolar n, mental branch V3
describe lymph drainage of teeth
submandibular lymph nodes
mandibular incissors drain to submental lymph
3rd maxillary molars drain to superior deep cervical lymph
What part of the tongue is immobile
posterior 1/3 because anchored to mandible, hyoid and syloid process
what are the external features of the tongue
terminal sulcus
foramen cecum
median sulcus
median and lateral glossoepiglottic folds
epiglottic vallevulae
papillae- vallate, filiform (no taste buds), fungiform, foliate, lingual tonsils
frenulum of tongue
What are the intrinsic mm of tongue
longitudinal
vertical
transverse
what mm allow for tongue to curl
longitudinal
what are the extrinsic mm of tongue
genioglossus, hyoglossus, styloglossus, palatoglossus
o i action inn genioglossus
o: mental spine of mandible
i: dorsum of tongue from apex to hyoid
inn: hypoglossal n
bilateraly protrudes tongue, acting unilateral and pushed tongue to opp side
o i action and inn hyoglossus
o: hyoid bone
i: inferolateral side of tongue
inn: hypoglossal n
action: retracts, depresses tongue