상악동 중격 존재시에 변형된 상악동거상술의 증례

This is to report a case of modification of the standard sinus lift procedure in the presence of sinus septa. This procedure was performed only on the anterior compartment of maxillary sinus with simultaneously demineralized freeze-dried bone graft and placement of Br^nemark titanium implants. The advantages obtained by this procedure are a decrease in quantity of grafted bone, easy operation, and a decrease in operating time. The incidence of sinus septa is unknown. If septa are not identified prior to the initiation of the sinus lift procedure, problems such as inability to infracture the bony window or an inadvertent perforation of the Schneiderian membrane may occur. Therefore, the presence or absence of sinus septa should be confirmed by means of a preoperative panoramic radiograph and computed tomographic scans. If the sinus septa are present, then successful results may be achieved through this modified sinus lift procedure.