Shen Yi-min, Xu You-you, Xu Shuang, Xu Pei-cheng
Shanghai Xuhui District Dental Center, Shanghai 200032, China.
Shanghai Kou Qiang Yi Xue. 2009 Jun;18(3):263-6.
The aim of this study was to evaluate the osteotome sinus floor elevation procedure with Straumann implants without bone grafting through observing the implant survival rate and the change of bone around the implant, and explored new bone formation and stability when the implants protruding in the sinus less than 3mm.
23 patients with single upper maxillary molar lost were included in this study. The mean residual bone height (RBH) under the maxillary sinus was 5-8 mm and the distance of the implants protruding into the sinus was less than 3mm without bone grafting. A healing period of 3-4 months was allowed before abutment tightening at 35 N x cm. All the patients were followed up for 2 years to evaluate the implant survival rate. X-ray measurements (immediately after implant placement, after 3,6,12,24 months postoperatively) were performed to calculate the length of the implant protruding into the sinus and if the new bone formed near it.
At the end of 2-year, the implant survival rate was 100% and the implants resisted the applied 35 N.cm torque and supported the definitive prosthesis well. The mesial and the distal sides of the implants protruding into the sinus had new bone formation. No hard tissue could be seen around the apical implant 3 months after inserting and the boundary between the new bone and the original sinus floor could not be seen 2 years after surgery.
Elevation of the sinus membrane alone without addition of bone grafting could have the similar effect to the OSFE with bone grafting.
本研究旨在通过观察种植体存活率及种植体周围骨组织的变化，评估使用士卓曼种植体且不进行骨移植的骨凿上颌窦底提升术，并探讨种植体在窦内突出小于3mm时的新骨形成及稳定性。
本研究纳入23例单颗上颌磨牙缺失患者。上颌窦下方平均剩余骨高度（RBH）为5 - 8mm，种植体植入窦内且不进行骨移植时突出距离小于3mm。在以35N x cm的扭矩拧紧基台之前，给予3 - 4个月的愈合期。对所有患者进行2年随访以评估种植体存活率。进行X线测量（种植体植入后即刻、术后3、6、12、24个月），以计算种植体突出到窦内的长度以及其附近是否形成新骨。
2年结束时，种植体存活率为100%，种植体能够承受35N.cm的扭矩并良好地支持最终修复体。突出到窦内的种植体的近中侧和远中侧有新骨形成。植入后3个月，根尖种植体周围未见硬组织，术后2年，新骨与原始窦底之间的边界不可见。
单纯提升窦膜而不添加骨移植与添加骨移植的骨凿上颌窦底提升术可能具有相似的效果。
