The Oral Cavity & Salivary The Oral Cavity & Salivary GlandsGlands
Oral CavityOral Cavity
The cavity that extends from lips to pharynx & contains the tongue & teeth
2 parts:
1. Vestibule:
space between ?
contains ?
divides into sulci: labial & buccal
2. Oral cavity proper:
enclosed by teeth
* The vestibule communicates with cavity proper at: 1. ?? & 2. ??
Oral Cavity ProperOral Cavity Proper
Space that enclosed by teeth & bounded:
Roof: hard palate
Floor: reflection of M.M. under the tongue
Ant.: communicates with Vestibule
Post.: communicates with oropharynx
OpeningsOpenings
2 openings:
Oral fissure:
from vestibule to outside
Oropharyngeal opening (isthmus):
from cavity proper to oropharynx
TeethTeeth
2 sets
1. Deciduous (primary) teeth:
5 in each quadrant (?)
start eruption ~ 6m
fully erupted ~ ??
1st primary tooth to erupt is ?
2. Permanent teeth:
8 in each quadrant (?)
Start eruption ~ ??
Fully erupted ~ 12 y (Except?)
*3rd molar = wisdom tooth
(because it erupts at older age)
Innervation of The TeethInnervation of The Teeth
GingivaeGingivae TeethTeeth
The TongueThe TongueA muscular organ that covered with mucous memb.
DividesOral part: ant. 2/3Pharyngeal part: post. 1/3
Surfaces:Palatal (dorsal)Tip & margins (opposite?)Lower surface (ventral, opposite?)Root:
connects tongue to ??
Dorsum of The TongueDorsum of The TongueMedian fissure
fibrous septumSulcus terminalis:
V-shaped ridge, separates?Foramen cecum: (blind opening)
at apex of sulcus term.marks the site of ?
Lingual papillae: 4 typesfiliform
smallest & numerous fungiform
tip & marginsvallate
8-12, in front of ?foliate
linear folds, on the sides
near terminal sulcus
Lingual Tonsil:
aggregation of L. nodules
on post. 1/3 of the tongue
part of Waldeyer’s ring
(4 kinds of tonsils)
Ventral Surface of The TongueVentral Surface of The Tongue
Covered by smooth & thin m.m.
1. Frenulum:
fold of m.m. connects …
2. Deep ling. Artery & vein
from??
3. Fimberiated fold
Muscles of The tongueMuscles of The tongue
2 typesIntrinsic:
not attached to bone
3 directions:
longi., transv., & vertical
innervation?
Action:
change tongue shape
Extrinsic:
4 (5?) muscles
Innervation to The TongueInnervation to The Tongue
Sensory:
general: Ant. 2/3 ?
Post. 1/3 ?
Special: Ant. 2/3 ?
Post. 1/3 ?
Motor: ??
Arterial Blood Supply to The TongueArterial Blood Supply to The Tongue
Lingual a.:
from??
pass deep to hyoglossus m.
Branches: 3?
Tonsillar a.
from ?
Ascending pharyngeal a.
Lymph DrainageLymph Drainage
Tip:
submental L.N.
Lat. Ant. 2/3:
submandibular L.N.
Medial Ant. 2/3:
DCLN
Post. 1/3:
DCLN
Genioglossus & Airway PatencyGenioglossus & Airway Patency
Genioglossus m. is under constant state of contraction, to prevent the tongue from collapsing posteriorly & obstructing airway.
- Hypercontraction = ??
* When the pt. is deeply
anesthetized
genioglossus may relaxed &
The base of the tongue
moves posteriorly
Submandibular Salivary GlandSubmandibular Salivary Gland
Mixed gland (mucous & serous, mainly ?)
Rests on post. Border of ??
2 parts: large superficial
small deep
* Relations to superficial & deep parts:
Submandibular duct (Warton’s)Submandibular duct (Warton’s)
same length as parotid duct
(~ 5cm)
arises from deep part of the gland
pass ant.
opens beside the frenulum
(sublingual papilla)
Sublingual Salivary GlandSublingual Salivary Gland
Mixed gland (mainly ?)
Beneath m.m. of floor of mouth
Opens into the floor of mouth:
8-20 ducts (subling. Fold)
* Relations to the gland: