11. It is the location of the openings for the frontal sinus, maxillary sinus , and anterior ethmoidal sinus. 12. In some cases, the frontal and maxillary sinus can present problems in the subject due to the syndrome. 13. In maxillary posterior teeth, the degree of pneumatization of the maxillary sinus may also increase as the antral floor remodels. 14. "' Caldwell-luc antrostomy "'is an operation to remove irreversibly damaged mucosa of the maxillary sinus . 15. The maxillary sinus may drain into the mouth via an abnormal opening, an oroantral fistula, a particular risk after tooth extraction. 16. The prevalence of Underwood's septa in relation to the floor of the maxillary sinus has been reported at nearly 32 %. 17. Oroantral fistula ( OAF ) is an abnormal condition where the maxillary sinus is exposed to the oral cavity through an epithelialised fistula. 18. On the "'nasal surface "'of the maxilla is a large irregular opening that leads into the maxillary sinus . 19. To operate on the maxillary sinuses , which rest beneath the eyes and above the teeth, surgeons had to make incisions in the gumline. 20. The goal of the sinus lift is to graft extra bone into the maxillary sinus , so more bone is available to support a dental implant.
