Sometimes extraction of upper posterior teeth creates communication between the sinus and the oral cavity. This is because the root tips of these teeth are stuck in the lumen of the sinus. Ifan oroantral communication is diagnosed, a panoramic X-ray and/or X-ray of paranasal sinuses is taken. Thenthe presence of a sinus inflammation, cyst or other material needs to be ruled out. If the conditions mentioned above are not diagnosed, the closure of oroantral communication is performed through removing gums and moving them in such a way that the passage to the sinus created after the tooth extraction is closed. The wound is sutured for around two weeks. During this period the patient needs to strictly follow the doctor’s recommendations and undergo radiographic sinus assessment for several weeks after the procedure.