MAXILLARY AIR SINUS

By: Haneen Supervisor: Dr . OLA

Paranasal Sinuses:are air-filled spaces inside the skull bones related to nasal cavity.

• Paranasal sinuses are;

frontal, ethmoidal, sphenoidal & maxillary sinuses.

MAXILLARY AIR SINUS: The maxillary sinus is one of the four paranasal sinuses. The Maxillary sinus is the largest of the paranasal sinuses.

POSITION.SHAPEPOSITION: In the body of maxilla

SHAPE: Pyramidal, with its base directed medially towards the lateral wall of the nose, and the apex directed laterally in the zygomatic process of maxilla.

MAXILLARY SINUS

RELATIONS

• ROOF: Floor of orbit• FLOOR: alveolar process of maxilla• APEX: Directed laterally in the

zygomatic process of maxilla• BASE: Lateral wall of the nose• ANT. WALL: Ant wall of boby of

maxilla• POST: WALL: Post wall of boby of

maxilla

MAXILLARY SINUS

RELATIONSHIP B/W TEETH OF UPPER JAW AND MAXILLARY

SINUS• The floor is marked by several

conical elevations produced by the roots of the upper molar & premolar teeth.

• The roots may even penetrate the bony floor to lie beneath the mucous membrane.

BLOOD & NERVE SUPPLYARTERIAL SUPPLY:1. Facial2. Infraorbital3. Greater palatineVENOUS DRAINAGE:1. Facial 2. Pterygoid plexus of veinsLYMPHATIC DRAINAGE: Submandibular nodesNERVE SUPPLY:1. Infraorbital N2. Ant. Middle & post. Sup. Alveolar Ns

THE END

ANY QUESTIONS

THANKS