Orofacial chapter 32: Arterial supply and Venous drainage

** an exception to arterial supply rule

Carries DEOXYGENATED blood from the heart to the lungs

____________ then brings oxygenated blood from lungs into left atrium of heart

pulmonary artery

Aortic branching for Blood flow from the heart to the head ?

Right side= right subclavian, brachiocephalic, right common carotid

left side: left subclavian and left common carotid

Where does the common carotid bifurcate?

at larynx level

internal carotid: goes straight to skull RIGHT SIDE

external carotid: goes into neck and face LEFT SIDE

3 anterior branches of external carotid artery and what they supply

1. superior thyroid artery- thyroid gland and larynx

2. lingual artery- tongue and floor of mouth

3. facial artery- supplies muscles of of facial expression

Medial branch of external carotid artery; supplies?

** only one

ascending pharyngeal artery- pharyngeal wall and tonsil area

2 Posterior branches of external carotid artery; supplies?

1. Occipital artery- occipital region

2. Posterior auricular artery- behind the ear

2 superior most terminal branches of the external carotid artery

maxillary artery

superficial temporal artery

3 areas lingual artery supplies? **think of parts of tongue top, middle, bottom names

A.Dorsal Lingual Artery - deep posterior Tongue

B.Deep Lingual Artery - deep anterior tongue

C.Sublingual Artery - Ventral surface of tongue & floor of mouth

**cut tongue- profusely bleeds

facial artery location from external carotid; and span

• anterior branch of external carotid artery.

*starts at mandible; ends at inner corner of the eye

**pressure point for facial bleeding= point where the facial artery and the facial vein cross the mandible; @ lower mandible

maxillary artery external carotid location; which landmark is it near? and supplies? 2 areas it runs through?

-Terminal branch of external carotid

- at level of neck of condyle

**Blood supply for teeth of mandible and maxilla!!!!!!!

** supplies= muscles of mastication, teeth, oral and nasal CAVITY

** Runs forward in an 2 areas known as the Infratemporal Fossa and pterygopalatine fossa

the maxillary artery supplies blood to all except which structure?

Lateral pterygoid

Medial pterygoid

Tongue

Masseter

tongue

remember that tongue is supplied by lingual artery

maxillary artery supplies oral and nasal CAVITY

2 areas where maxillary artery runs through

infraTEMPORAL fossa

ptreygoPALATINE fossa

Maxillary Artery # of Branches

15 total branches**

6 infratemporal fossa branches

1.Inferior Alveolar

2.Temporal

3.Masseteric

4.Pterygoid

5.Middle Meningeal

6.Buccal Branches

4 Pterygopalatine Fossa Branches

1. descending palatine artery

2. posterior superior alveolar artery

3. pterygopalatine AKA sphenopalatine artery

4.infraorbital artery

inferior alveolar artery; foramen entrance and exit;

**infratemporal fossa branch of the maxillary artery

1. inferior alveolar artery with mental branch

**enter the mandibular foramen, runs in the mandibular canals

2. premolar region

** exits mandible through mental foramen

2 temporal branches of maxillary artery; supplies?

** infratemporal fossa branch of maxillary artery

supplies temporalis muscle

2 branches arise from maxillary artery

1. anterior artery

2. posterior deep temporal artery.

artery that runs LATERALLY through the coronoid notch

masseteric artery **infratemporal fossa branch of the maxillary artery

middle meningeal artery supplies; runs thru which tiny foramen?

**infatemporal fossa branch of maxillary artery

Runs up thru the Foramen **Spinosum** to supply the meninges of the brain

buccal artery supplies

**infratemporal fossa branch of maxillary artery

supplies buccinator

Descending palatine artery 2 branches; emerges from?

** pterygopalatine branch of maxillary artery

splits into 2 branches

1. Lesser Palatine Artery - Soft Palate

2. Greater Palatine Artery - Palatal Mucosa aka hard palate & Maxillary gingiva

**Emerge through from the Lesser & Greater Palatine Foramen

pterygopalatine canal

where the descending palatine artery feeds through

** remember its location

posterior superior alveolar artery ( PSA), supplies?

**pterygopalatine fossa branch of maxillary artery

Supplies blood to all maxillary posterior teeth & part of maxillary sinus

pterygopalatine/ sphenopalatine artery emerges from as? supplies?

**pterygopalatine fossa branch of maxillary artery

Emerges from the incisive foramen as the Nasopalatine Artery

Supplies most of the nasal cavity

infraorbital artery branches to? supplies?

**pterygopalatine fossa branch of maxillary artery

**End part of Maxillary Artery

From floor of orbital cavity, branches to: ANTERIOR SUPERIOR ALVEOLAR artery (ASA)

Supplies Maxillary Anterior Teeth- #6-11

jugular veins; properties and 2 branches

carries blood from head to superior vena cava to the right atrium

deoxygenated blood

branches off into internal and external jugular vein

**counterpart of common carotid (internal and external)

cavernous sinus

A sinus containing venous blood located on each side of the body of the sphenoid bone, near the base of the brain, behind the bridge of the nose

**cavernous sinus infection is deadly

internal jugular vein drains which 3 areas?

-Brain

-Facial vein (also empties cavernous sinus)

-Superficial temporal vein

Infections (chronic and stagnate) in this area can cause serious damage and possibly even death.

pterygoid plexus of veins drains? what 5 areas drains INTO it?

*Drains to form the maxillary vein

Structures that drain into the plexus include

1. teeth

2. muscles of mastication

3. buccinator

4. nose

5. palate

**causes HEMATOMA if pierced

Drains areas supplied by maxillary and superficial temporal arteries

__________________vein and maxillary vein forms the retromandibular vein

superficial temporal vein