Download - Anatomy II Upnar
-
8/11/2019 Anatomy II Upnar
1/28
Anatomy II
Head Neck
BY:
DR Yahya Alfarra
CANADIAN BOARD IN DENTISTRY
-
8/11/2019 Anatomy II Upnar
2/28
Parotid region
arotid gland:: Size :its the largest salivary
gland & its compose of serousacini.
Shape :its wedge shaped ,
Site & extension:it liesbetween the ramus of Md. &SCM
It extends :
Upward:to zygomatic arch
Downward:to angle of Md.
Anteriorly:to cover part ofmasseter ms.
Posteriorly:to overlap SCM
-
8/11/2019 Anatomy II Upnar
3/28
Parotid duct(stensons duct)
Length : 5 cm long
Beginning : at the
ant. Border of thegland
End: by opening
into the oral cavityopposite the upper2ndmolar tooth
-
8/11/2019 Anatomy II Upnar
4/28
Opens in the oral cavity
opposite to the second
upper molar tooth.
-
8/11/2019 Anatomy II Upnar
5/28
Blood supply of P.G
Arterial supply : small branches from ECA
inside the gland
Venous drainage: into retromandibular V.
Lymphatic drainage : into deep & superficial
parotid lymph node
Nerve supply of parotid :Sensory :
great auricualr N. auriculotemporal N.
-
8/11/2019 Anatomy II Upnar
6/28
Superficial temporal artery
-
8/11/2019 Anatomy II Upnar
7/28
Temporal region
Temporal fossa
Infratemporal fossa
MuSclE OF mastications
-
8/11/2019 Anatomy II Upnar
8/28
Temporal fossa
Boundaries :
Sup. Temporal line above
Zygonatic arch.below
Frontal process of zygomaticbone.ant.
Contents(attachments):
2 superficial Ms of mastications
Muscles :
a) temporalis Ms. b) masseter Ms
Nerves :
a ) deep temporal N.b)auriculotemporal N.
Vesseles:superficial temporal A.
-
8/11/2019 Anatomy II Upnar
9/28
Infratemporal fossa
Boundaries:
Anteriorly: post. Surface of maxilla
Posteriorly : styloid & mastoidprocess
Medially:lateral pterygoid plate
Laterally: coronoid process &ramus of Md.
Contents:
Muscles :2 deep Ms ofMastications
a) medial pterygoid Ms. b ) lateral
pterygoid m.
Nerves:a ) Md. N. b ) chordatympani c ) Mx. N.
Vesseles : a ) Mx. A. b )pterygoid plexus of viens
-
8/11/2019 Anatomy II Upnar
10/28
Muscles of mastications
Lateral
Pterygoid
Medial
pterygoiod
temporalisMasseter
Arise by 2
head
a)Upper
head(infratem
poral
surfaceofgreater wing
of sphenoid )
b) Lower
head(lat.
Surface of lat.
Pterygoid
plate)
Arise by 2 head
a)superficial
head(Mx.tubero
sity)
b) Deephead(med.
Surface of lat.
Pterygoid
plate)
Floor of
temporal
fossa
?origin
Front of
neck of
Md. &
articular
disc of
T.M.J
Med. Surface of
angle of Md.
?.Lateral
(outer)surface
of ramus of
Md.
Insertion
-
8/11/2019 Anatomy II Upnar
11/28
Muscles of mastications
Lateral
Pterygoid
Medial
pterygoiod
temporalisMasseter
Depress Md.Elevate Md.Elevate Md.Elevate Md.
To occlude
teeth in
mastication
Action
Anterior
division of
mandibularnerve
?Anterior
division of
mandibularnerve
Anterior
division of
mandibularnerve
Nerve
supply
-
8/11/2019 Anatomy II Upnar
12/28
-
8/11/2019 Anatomy II Upnar
13/28
-
8/11/2019 Anatomy II Upnar
14/28
-
8/11/2019 Anatomy II Upnar
15/28
Submandibualr region
Definition:its the regoin between Md. & hyoidbone.
It contains :
Muscles:digastric, mylohyoid , hyoglossus,geniohyoid , genioglossus & styloglossus
Salivary gland :submandibualr & sublingual
Nerves :lingual , glossopharyngeal & hyoglossal
Blood vesseles:facial A. & V. , Lingual A. & V.
Parasympathetic ganglion :submandibualr
Lymph nodes :submandibualr group
-
8/11/2019 Anatomy II Upnar
16/28
Muscles of sumandibualr regionstyloglossusgenioglossushyoglossusgeniohyoidmylohyoiddigastric
Styloidprocess
Uppergenial
tubercle of
Md.
Body ofhyoid
bone
it.s a smallMs lying
deep(above)
to mylohyoid
From genial
tubercle(behi
nd
symphysis
menti of Md.)
MylohyoidMd.
Arise by 2bellies: ant.
Belly:lowerborder of Md.
Close to
symphysis
menti
Post. Belly:medial
surface of
mastoid
process
origin
Whole
length ofside of
tongue
Whole
lengthUnder
surface of
tongue
Inside
tonguedeep to
styloglo
ssus
Upper
surface ofbody of
hyoid
Body of
hyoidbone
Into
intermediate tendon
that
connected
hyoid
bone
insertion
M l f dib l i
-
8/11/2019 Anatomy II Upnar
17/28
Muscles of sumandibualr regoinstyloglossusgenioglossu
s
hyoglossusgeniohyoidmylohyoiddigastric
Hypoglossal
N.
Hypoglossal
N.
Hypoglossa
-l N.
From C1 via
HypoglossalN.
N. to
mylohyoid abranch of
Inferior
alveolar N.
(from Md. N.)
Ant. Belly :N. to
mylohyoid abranch of Inferior
alveolar N. (from
Md. N. )
Post. Belly:
Facial Nerve
Nerve
supply
Retract
tongue
upward&
backward
Protrude
tongue into
midline
Depress
tongue
*elevate
Hyoid Bone
*depress
Md. If Hyoid
Bone is
Fixed(open
Mouth)
*supportFloor of
mouth
*elevate
Hyoid Bone
*depressMd. If Hyoid
Bone is
Fixed(open
Mouth)
Ant. Belly :
opening Md.
Post. Belly:
Retract hyoid
bone upward&
backward
Action
-
8/11/2019 Anatomy II Upnar
18/28
-
8/11/2019 Anatomy II Upnar
19/28
-
8/11/2019 Anatomy II Upnar
20/28
alivary gland
-
8/11/2019 Anatomy II Upnar
21/28
Submandibular gland
Site & extension: It lies belowMd.
It extends to :
Mylohyoid line : a bove
Digastric muscle : below
Mental foramen : anterior
Angle of Md. : posterior
Size:about the size of P.G.
Shape:wedge shape Structure:it consists of 2parts,a large superficial part &a small deep part
-
8/11/2019 Anatomy II Upnar
22/28
Submandibular duct
Its 5 cm long
Its duct open into
the floor of mouthclose to frenulum of
tongue.
-
8/11/2019 Anatomy II Upnar
23/28
Blood supply of gland
The arterial supply:the gland is supplied by branchesof facial & lingual A.
The viens drain into facial & lingual V.
Nerve supply :
sympathetic:from plexus arround lingual A.
Parasympathetic:from facial N.
-
8/11/2019 Anatomy II Upnar
24/28
Sublingual gland
Site:beneath tongue
Size:its the smallest of the 3S.G.
Shape:almond-shaped
Relation :
Ant. : the gland of the oppositeside
Post. : the deep part ofsubmandibualr gland
Med. : genioglossus Ms. ,
lingual N. & submand. DuctLaterally:sublingual fossa of Md.
Sup. : mucous membrane ofmouth(which elevated to formsublingual fold)
Inf. : mylohyoid Ms.
-
8/11/2019 Anatomy II Upnar
25/28
-
8/11/2019 Anatomy II Upnar
26/28
Sublingual duct :It opens directly in the floor of mouth on sublingualfold
Blood supply :the gland is supplied by
branch of facial & lingual A.The viens drain into facial & lingual V.
Nerve supply :
sympathetic :
from plexus arround lingual A. Parasympathetic:from facial N.
-
8/11/2019 Anatomy II Upnar
27/28
Nerves OF submandibualr regoin
lingual , glossopharyngeal & hyoglossalN.B. :lingual N. : branch of post. Division of Md. N. in the
infratemporal fossa
Blood vesseles submandibualr regoin:facialA. & V. , Lingual A. & V.N.B.
Facial A.: Branch of ECA
Facial V. :It units ant. Division of retromandibualr V. TO
drain into IJVLingual A. :Branch of ECA
Lingual V. :drain into IJV
-
8/11/2019 Anatomy II Upnar
28/28
Good luck