Because of its physical and mechanical properties, the odontologic applications of ultrasound are increasing. A new application of odontologic ultrasonic generators involves the lateral approach of the maxillary sinus in sinus augmentation. The procedure may provide important advantages over conventional ostectomy using diamond drills, as it reduces the risk of perforating the Schneiderian membrane, improves vision and hygiene of the operating area, and provides a more conservative and controlled osseous incision. Schlagwörter: implant, osseous graft, sinus ostectomy, ultrasound