CBCT在上颌窦底提升术中的应用

Clinical application of sinus floor elevation guided by cone-beam computer tomography

目的：探讨利用锥形束CT（cone beam computer tomographv，CBCT）评估上颌后份缺牙区牙槽骨的骨量情况，评价其指导上颌窦提升术的临床效果。方法：对28例计划行上颌后牙区种植患者拍摄CBCT．根据分析结果．上颌窦底骨高度5～10mm、适合行经牙槽嵴顶上颌窦提升术患者19例．上颌窦底骨高度〈5mm、适合行经侧壁开窗上颌窦提升术患者7例，治疗结束后评估其临床效果。结果：CBCT检测上颌后牙区牙槽骨骨量不足者26例．1例上颌窦黏液囊肿，2例上颌窦分隔。19例完成经牙槽嵴顶上颌窦提升术，7例完成经侧壁开窗上颌窦提升术，并全部完成修复．成功率为100％。结论：CBCT在上颌后牙区颌骨骨量判断及上颌窦底提升术中具有重要指导作用。

PURPOSE： To investigate the value of using con-beam computer tomography （CBCT） to evaluate bone volume in the edentulous area of posterior maxilla, and guide sinus floor elevation. METHODS： Twenty eight patients who planed to receive dental implant in the posterior maxilla underwent CBCT scan. After analysis of residual bone height, 19 patients with 5-10 mm bone height below the sinus floor underwent transcrestal sinus floor elevation, while 7 patients with less than 5 mm bone height below the sinus floor underwent lateral window sinus floor elevation. The treatment outcomes were assessed postoperatively. RESULTS： CBCT detected bone deficiency in the posterior maxillary alveolar bone in 26 patients, mucus cyst of maxillary sinus in 1 patient and sinus septa in 2 patients. Nineteen patients underwent transcrestal sinus floor elevation, and 7 patients underwent lateral window sinus floor elevation. All patients completed final dental restorations, and the restorations achieved satisfactory function and esthetic. CONCLUSIONS： CBCT imaging plays an important role in determining bone quality in posterior maxilla and guiding sinus floor elevation. Supported by Social Undertakings Technological Innovation and Demonstration Program of Nantong City （HS2011035）.