Abstract: An oroantral fistula is an abnormal pathological communication between maxillary sinus and oral cavity, which arise as a result of infections in the tooth, radiation therapy ,osteomyelitis and iatrogenic exposure. It is mainly present in the region of maxillary bicuspids and molars. Oroantral communication is a common one faced by oral surgeons. This poses a risk between sinus and oral cavity, causing regurgitation of sinus contents into oral cavity. This article describes about the different methods and materials used for of closure of oroantral fistula.