A case that performed maxillary sinus floor augmentation in the presence of antral retention cyst

Abstract

Reported here is a patient with a mucous retention cyst in the sinus for which maxillary sinus floor elevation surgery was performed after aspiration of the cyst interfluid. A 49-year-old man had requested implant treatment and was referred to our department by his dentist. Results of our initial examination, showed that the upper jaw was edentulous, while no abnormal findings were noted in the alveolar mucosa. X-ray findings revealed a retention cyst in the right maxillary sinus as well as significant vertical bone resorption in the bilateral maxillary molar alveolar bone. Under a diagnosis of abnormal absorption of the maxillary ridge, bilateral maxillary sinus floor elevation was performed under general anesthesia at 7 months after the first visit. A bony window was formed on the right side, then mucus from the retention cyst was aspirated with a syringe (18G). After elevating the maxillary sinus mucosa, a mixed graft consisting of bone grafting material and blood was tightly packed into the raised sinus floor. The postoperative course was good and 3yeas and 4months have passed without any complications.