Summers骨凿提升上颌窦的临床应用

目的评价Summers骨凿在上颌窦闭合式内提升、植骨及同期牙种植术中的效果。方法对上颌后牙区牙槽骨严重吸收的66例患者，采用Summers骨凿预备种植床，植入人工骨并同期植入种植体，术后6个月完成种植修复。结果66例患者上颌窦提升高度2~5 mm，术后皆无上颌窦炎发生。牙科CT扫描显示窦内形成一圆形光滑的突起，提升部位表面光滑完整，无黏膜穿破表现。6个月后X线片显示植入的骨材料无明显吸收，种植体骨结合完成。种植修复完成12~24个月后复查，无种植体松动、脱落，牙龈组织健康，种植体上部结构功能恢复满意。X线片显示：种植体与骨结合紧密，种植体周围骨垂直吸收小于1 mm。结论Summers骨凿可安全地提升上颌窦底，并可避免异位取骨，值得临床推广。

Clinical application of maxillary sinus lift with Summers osteotome

Objective To introduce and evaluate the procedure and the effect of maxillary sinus lift with closed technique by Summers osteotome,bone grafting and simultaneous implant placement.Methods 66 cases with severelyresorbed alveolar bone in maxillary posterior region received sinus lift with Summers osteotome,simultaneously bone grafting and implants placement.The final restoration was finished at 6 months postoperatively.Results The operation procedure were eventless in the 66 cases,the sinus floor were elevated by 2-5 mm,three-dimensional reconstruction of the CT scan pictures showed the smooth dome profile of the lifting sites and no signs of laceration on the membrane,and there were no maxillary antritis after operation.After 6 months,no significantly bone graft resorption and good osseointegration were noticed in X-ray imaging.The final restoration was finished at this time.12-24 months after the restoration,all implants inserted were remain,the hard and soft tissue were healthy,prosthesis were stable and functioned.X-ray showed good osseointegration in the lifting sites,the vertical resorption around the implants were less than 1 mm.Conclusion With properly use of Summers osteotome,scraps of the bone in the implant sockets can be pushed into the sinus,these autogenous bone scraps were in favor of the osseogenesis and the sinus floor can be easily elevated by the method with very infrequent complications.It enlarged indication of dental implants and avoided operation of harvesting autogenous bone in other site.The method is simple and valuable to clinical application.