The oral cavity & salivary glands
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Transcript of The oral cavity & salivary glands
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The Oral Cavity & Salivary The Oral Cavity & Salivary GlandsGlands
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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. ??
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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
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OpeningsOpenings
2 openings:
Oral fissure:
from vestibule to outside
Oropharyngeal opening (isthmus):
from cavity proper to oropharynx
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TeethTeeth
2 sets
1. Deciduous (primary) teeth:
5 in each quadrant (?)
start eruption ~ 6m
fully erupted ~ ??
1st primary tooth to erupt is ?
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2. Permanent teeth:
8 in each quadrant (?)
Start eruption ~ ??
Fully erupted ~ 12 y (Except?)
*3rd molar = wisdom tooth
(because it erupts at older age)
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Innervation of The TeethInnervation of The Teeth
GingivaeGingivae TeethTeeth
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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 ??
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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
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Lingual Tonsil:
aggregation of L. nodules
on post. 1/3 of the tongue
part of Waldeyer’s ring
(4 kinds of tonsils)
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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
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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
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Innervation to The TongueInnervation to The Tongue
Sensory:
general: Ant. 2/3 ?
Post. 1/3 ?
Special: Ant. 2/3 ?
Post. 1/3 ?
Motor: ??
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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.
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Lymph DrainageLymph Drainage
Tip:
submental L.N.
Lat. Ant. 2/3:
submandibular L.N.
Medial Ant. 2/3:
DCLN
Post. 1/3:
DCLN
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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
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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:
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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)
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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: