单个种植体即刻种植即刻负重骨结合情况的动物实验研究  

Peri-implant bone reaction to immediate placement and loading of single implant:An experimental study in dogs

作　　者：李一梓[1] 谭包生[2] 

机构地区：[1]北京朝阳医院口腔科,100020 [2]首都医科大学附属北京口腔医院口腔颌面外科

出　　处：《北京口腔医学》2005年第3期159-161,164,共4页Beijing Journal of Stomatology

摘　　要：目的本实验设计了单个种植体即刻种植即刻负重的动物模型,目的在于研究种植体周围硬组织的变化.方法选取8只成年狗,体重10～15 kg.分别拔除每只狗的双侧下颌第二前磨牙;同时,各植入一枚ITI种植体,分别以20Ncm及30Ncm的扭矩旋入.实验侧即刻以树脂冠行上部结构修复,对照侧无负荷.每只狗在植入种植体后和处死后拍X线片,观察其影像学的改变.动物分别于1个月和3个月处死后取标本,观察其组织学的改变.结果16枚种植体中14枚种植体获得良好的骨结合,种植体周围包绕着致密的骨组织,未观察到任何间隙和结缔组织长入.实验侧1枚种植体脱落,对照侧1枚种植体松动.结论单个种植体的即刻种植即刻负重是一个可行的选择.Objective To evaluate the peri-implant bone reaction to immediate placement and loading of single implant. Methods Eight adult dogs weighting about 10 to 15 kg were used in this study. As soon as the second premolars in mandible were extracted the SLA ITI solid screw implants were placed in each fresh extraction sites with 20 Ncm and 30 Ncm torque. Test implants were placed into immediate full occlusal loading with acrylic resin temporary crowns, and control implants were not loaded. Radiographs were both recorded after the implants placed immediately and at the end of loading time. Specimens were examined and evaluated histologically one month and three months later. Results Among the 16 implants, 14 implants were osseointegrated. Compact bone in contact with the implant surface without any gaps or connective tissue formation was observed. One implant in test group failed. One implant in control group was mobile. Conclusion Immediate loading of single-tooth implants placed in fresh extraction sites is a possible treatment alternative.

关 键 词：即刻负重 即刻种植 单个种植体 

分 类 号：R783.6[医药卫生—口腔医学]