Oroantral communication is an abnormal connection caused by bone and soft tissue loss between the oral cavity and the maxillary sinus. 1 There are so many reasons that lead to this connection, including the removal of maxillary cysts and tumours, trauma and the extraction of the maxillary posterior teeth. 2 Defects that are 2 mm or smaller heal without any surgery but 3 mm or larger need surgical closure. 3 To prevent oroantral fistula formation and sinus infection, the communication should be closed within 1-2 days. 4 In the medical literature, there are different techniques to close the OACs. Each technique has its advantages, disadvantages and indications, such as soft tissue flaps (buccal advanced flap, palatal flap and pedicled buccal fat pad), bone grafts (chin and