What is a maxillary sinus ?

Answers:     call upon your DOCTOR & ASK HIM.

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a hole in your maxilla bone

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The maxillary sinus is the largest of the paranasal sinuses, and is pyramidal in shape. It's One of a pair of sinuses forming a cavity in the maxilla.
a optical aid, view this diagram:

http://www.sinusinfocenter.com/images/In…

- Chuckie.

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