&
my
Anatomy of Oral Cavity
The oral cavity extends from the lips isthmus
oropharyngeal
·
to the .
Oropharyngeal isthmus is of the mouth & pharynx Bounded Superiorly by
~
the
junction . the soft plate laterally
,
by the
palatoglossal arch & inferior by the dorsum of the
tongue .
The carity
·
oral cavity is subdivided into Vestibule & Oral proper.
upper vestibule
1. Vestibule
~
A slit like space between the & lips /cheeks Vestibule
gums
.
Communicates with exterior fissure.
through
~
the mouth the oral lower vestibule
~
When the is closed, it communicates with oral cavity from behind
jaw proper
the 3rd molar teeth .
The cheeks form the lateral wall of the
~
vestibule .
Buccinator muscle is found in the cheek .
A small
opening the opposite the 2nd
~
on mucosa ,
molar tooth marks the opening of the duct of the parotid gland
.
2 .
Oral Cavity Proper
~
The area behind the teeth .
It's roof is formed anteriorly by the
hard plate & posteriorly by the soft plate . Oral cavity
Proper
Floor of the Mouth
-
Covered with
·
mucous membrane In the midline ,
. a mucosal fold , the frenulum
floor of the mouth
connects the
tongue to the .
· On each
side of the frenulum , a papilla has
small the
opening of the duct of
the Submandibular
gland .
Nerve Supply
u s e
·
Sensory : -Roof :
greater Palatine nasopulatine N .
branch of maxillary N
.
branch of mandibular
Floor :
Lingual Nerve
~
nerve
~
Cheek : Buccal Nerve ↓
·
Motor : Cheek Muscle buccinator) & lip Muscle Orbicularis oris by branches of Fascia N ·
, Lymph Nodes
u s e
Important Lymph nodes
in Neck
Region
Tongue
~
·
It is of stricted muscles covered with membrane It is divided into halves
a mass mucous .
right & left .
·
Contains 3 Oral (Anterior Posterior 113 & Root
parts : pharyngeal
2/s Base
.
,
·
Also has
2 surfaces ; Dorsal & Ventral
1 .
Dorsal surface
o
Divided anterior 23 & posterior" by ""shaped
~
into a
terminal Succus The apex of the
. sulcus faces backwards & is marked by the foramen Cecum
.
e
The foramen
~
cecum marks the site of the of the
upper end duct
thyroglossal
.
Anterior two third : has
rough that types of papillae :
~
a mucosa shows 3
.
1 Filliform .
2
Fungiform 3 Vallate
.
Posterior third No papillae but shows nodular surface due to the
lingual tonsils
~
one : .
Ventral Surface
Post 113
2:
.
-
~
Smooth No papillae .
Contains frenulum that connects
tongue floor of mouth.
~
a to
Lateral to the frenulum , deep vein is
lingual a lateral
~
seen
Ant . 213
to the vein ,
a fold of mucusa forms the plica fimbriata
.
Muscles
-
Has two types of muscles :
1 . Intrinsic Muscles
.
2) Extrinsic Muscles
.
my
Anatomy of Oral Cavity
The oral cavity extends from the lips isthmus
oropharyngeal
·
to the .
Oropharyngeal isthmus is of the mouth & pharynx Bounded Superiorly by
~
the
junction . the soft plate laterally
,
by the
palatoglossal arch & inferior by the dorsum of the
tongue .
The carity
·
oral cavity is subdivided into Vestibule & Oral proper.
upper vestibule
1. Vestibule
~
A slit like space between the & lips /cheeks Vestibule
gums
.
Communicates with exterior fissure.
through
~
the mouth the oral lower vestibule
~
When the is closed, it communicates with oral cavity from behind
jaw proper
the 3rd molar teeth .
The cheeks form the lateral wall of the
~
vestibule .
Buccinator muscle is found in the cheek .
A small
opening the opposite the 2nd
~
on mucosa ,
molar tooth marks the opening of the duct of the parotid gland
.
2 .
Oral Cavity Proper
~
The area behind the teeth .
It's roof is formed anteriorly by the
hard plate & posteriorly by the soft plate . Oral cavity
Proper
Floor of the Mouth
-
Covered with
·
mucous membrane In the midline ,
. a mucosal fold , the frenulum
floor of the mouth
connects the
tongue to the .
· On each
side of the frenulum , a papilla has
small the
opening of the duct of
the Submandibular
gland .
Nerve Supply
u s e
·
Sensory : -Roof :
greater Palatine nasopulatine N .
branch of maxillary N
.
branch of mandibular
Floor :
Lingual Nerve
~
nerve
~
Cheek : Buccal Nerve ↓
·
Motor : Cheek Muscle buccinator) & lip Muscle Orbicularis oris by branches of Fascia N ·
, Lymph Nodes
u s e
Important Lymph nodes
in Neck
Region
Tongue
~
·
It is of stricted muscles covered with membrane It is divided into halves
a mass mucous .
right & left .
·
Contains 3 Oral (Anterior Posterior 113 & Root
parts : pharyngeal
2/s Base
.
,
·
Also has
2 surfaces ; Dorsal & Ventral
1 .
Dorsal surface
o
Divided anterior 23 & posterior" by ""shaped
~
into a
terminal Succus The apex of the
. sulcus faces backwards & is marked by the foramen Cecum
.
e
The foramen
~
cecum marks the site of the of the
upper end duct
thyroglossal
.
Anterior two third : has
rough that types of papillae :
~
a mucosa shows 3
.
1 Filliform .
2
Fungiform 3 Vallate
.
Posterior third No papillae but shows nodular surface due to the
lingual tonsils
~
one : .
Ventral Surface
Post 113
2:
.
-
~
Smooth No papillae .
Contains frenulum that connects
tongue floor of mouth.
~
a to
Lateral to the frenulum , deep vein is
lingual a lateral
~
seen
Ant . 213
to the vein ,
a fold of mucusa forms the plica fimbriata
.
Muscles
-
Has two types of muscles :
1 . Intrinsic Muscles
.
2) Extrinsic Muscles
.
