blood supply of the um
TRANSCRIPT
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Al Quds UniversityFaculty of Dentistry
Periodontics Lab.
PeriodontiumBlood Supply of the
Prepared by : Haya Khalili
Spring 2011
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The Vasculature of any living organ consists of
Arterial blood supply and Venous drainage .
We should note that the veins accompany the
arteries in their path.
The periodontal vessels follow the nerve in
their supply.
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The Periodontium takes its arterial blood
supply from branches of the External Carotid
Artery.
The venous drainage through the Internal
Jugular Vein and the External Jugular Vein.
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The External Carotid Artery begins oppositethe upper border of the thyroid cartilage, and,taking a slightly curved course, passes upward
and forward, and then inclines backward tothe space behind the neck of the mandible,where it divides into the Superficial Temporaland Internal Maxillary arteries. It rapidly
diminishes in size in its course up the neck,owing to the number and large size of thebranches given off from it.
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Palataly:
The posterior aspect of the periodontium (
along the levels of the molar and premolarteeth) is supplied mainly by the Greater
Palatine Artery, a branch of the Decending
palatine Artery, which is a branch of the third
part of the Maxillary artery (pterygopalatine).
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The anterior aspect of the periodontium (at
the level of the anterior teeth , from canine to
canine) is supplies by the Nasopalatine (
Sphenopalatine ) Artery which is a branch of
the third part of the Maxillary Artery, and
some anastomoses from the Greater Palatine
Artery.
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Buccaly:
The periodontium at the level of the molar
and premolar teeth is supplied by thePosterior Superior Alveolar Artery which is a
branch of the third part of the Maxillary
Artery.
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At the level of the anterior teeth ( canines and
incisors) the blood supply is gained from the
Infraorbital Artery, a branch of the third part
of the Maxillary Artery.
This artery gives off the Anterior Superior
Alveolar Artery.
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Buccaly:
The periodontium at the level of the posterior
teeth is supplied by the Inferior AlveolarArtery- a branch of the first part of the
Maxillary Artery ( Mandibular).
Also it is provided by the Buccal Artery, which
is a branch of the second part of the Maxillary
Artery (Pterygoid).
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At the level of the anterior teeth the blood
supply comes from the Mental Artery, which is
a branch of the Inferior Alveolar Artery.
Some branches of the Facial Artery
(Submental and Inferior Labial) has
anastomosis with the Mental Artery and may
play part in the support.
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Lingually:
The Lingual Artery a branch of the Inferior
Alveolar Artery. The Sublingual artery a branch of the
External Carotid Artery.
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This figure shows the
anastomosis (arrow)
between the facialartery (a.f) and the
blood vessels of the
mandible.
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The gingiva receives its bloodsupply mainly throughsupraperiosteal bloodvessels, which are terminalbranches of the:
Sublingual artery (a.s)
The Mental artery (a.m) The Buccal artery (a.b)
The Facial artery (a.f)
The Greater palatineartery(a.p)
The Infraorbital artery (a.i) And the Posterior superior
dental artery (a.ap).
a.i
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This figure depicts the course ofthe greater palatine artery ( a.p)
in a specimen of a monkey whichwas perfused with plastic,consequently , the soft tissuedissolved.
The greater palatine artery (a.p) ,which is a terminal branch of the
ascending palatine artery ( fromthe maxillary, internalmaxillary, artery), runs throughthe greater palatine canal (arrow)to the palate.
As this artery runs in a frontaldirection it puts out brancheswhich supply the gingiva and themasticatory mucosa of thepalate.
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Note that the free
gingiva receives its
blood supply from :
1.Supraperiosteal blood
vessels .
2.The blood vessels of
the periodontal
ligament.
3.The blood vessels of
the alveolar bone.
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The Maxillary Vein is formed in the Infratemporalfossa.
It joins the Superficial Temporal vein to form theRetromandibular vein.
When the Retromandibular vein leaves theparotid gland, it divides into anterior branchwhich joins the Facial vein, and a posteriorbranch which joins the Posterior Auricular vein to
form the External Jugular vein .The Lingual vein drains back to the Internal
Jugular vein.
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