What is maxillary sinus?

There are four pairs of sinuses in the facial region near your nose or eyes. They are called Paranasal sinuses. They are maxillary sinuses, frontal sinuses, sphenoid sinuses and ethmoid sinuses. The main function of these sinuses are to maintain air cavity of your skull as well as reduce weight of your skull. Of these the maxillary sinuses is the largest of all paranasal sinuses. Its is also called antrum or high more.

The maxillary sinuses is found in the body of maxilla and has three recesses. They are alveolar recess, a zygomatic recess, and an infraorbital recess. The part of maxillary sinus which is used for drainage is called ostia and the gravity cannot drain the mucus of maxilla when the head is in erect position. The size of the each maxillary sinus varies from skull to skull and even on both the sides of your skull.

What happens in this condition?

The maxillary sinus is vulnerable to bacterial infection which may lead to a problem called sinusitis. The maxillary sinus communicates through an opening into the semilunar hiatus which present on the lateral wall of the nasal cavity.

In maxillary sinus infection the sinuses get dilled with fluid and the whole sinus lining gets inflamed. As a result the person feels some kind of pain in his or her back teeth. This is one of the common symptoms of maxillary sinus infection. The other signs and symptoms of maxillary sinuses include headache, pain in the facial area, congestion of nose, jaw pain, pain in the ear, and irritation in eyes.

Maxillary Sinusitis can be the result of factors like AIDS, Cystic fibrosis, Allergies, Prolonged orotracheal intubation, Nasotracheal intubation and Nasal polyps.





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