於上顎後牙區進行植牙手術時，常因齒槽骨萎縮，及上顎竇構造的影響，使無牙骨量不足，故常需利用上顎竇增高術以獲得足夠骨量提供植體空間，來完成植牙手術。超音波骨刀運用於側方開窗術式之上顎竇增高術與傳統旋轉器械相比，有效減少術中上顎竇膜破孔之併發症及術後病人不適感。本篇報告為使用超音波骨刀完成上顎竇增高術之臨床病例，並針對超音波骨刀應用於上顎竇增高術的優勢及結果進行討論。

It is difficult to have dental implant over maxillary posterior edentulous ridge, due to the anatomic limitation of maxillary sinus. To increase the bone height for implant placement, maxillary sinus lift by osteotome technique or lateral window technique is executed oftentimes. When the bone height is deficient severely, lateral window technique is carried out prior to place dental implant. Comparison between piezoelectric device and conventional rotary instruments used in sinus lift by lateral window technique, the use of piezoelectric device decreased the frequency of membrane perforation. Here, we present a case of maxillary sinus lift with piezoelectric bony window osteotomy and share experience.