不锈钢微植体支抗稳定性的动物实验研究  

The animal experiment on the stability of stainless steel microimplant anchorage

作　　者：许志强[1] 邱著文[1] 史建陆 

机构地区：[1]福建莆田学院附属医院口腔正畸科,351100 [2]厦门市口腔医院正畸科

出　　处：《现代口腔医学杂志》2014年第1期36-39,共4页Journal of Modern Stomatology

摘　　要：目的评估不锈钢微植体支抗即刻负载的稳定性。方法选用8只本地成年雄性犬,每只犬任选一侧上颌骨和对侧下颌骨各植入一枚不锈钢和钛合金微植体。同颌两对应微植体间即刻加载200g的力。4周和12周时各随机处死2只实验犬,制作不锈钢微植体硬组织切片进行组织学研究。4周和12周时各随机处死2只实验犬,取带不锈钢微植体的骨组织块,检测种植体-骨界面剪切力。结果所有不锈钢微植体均没有松动、脱落。不锈钢微植体与周围组织有良好的生物相容性,种植体周围有纤维组织和骨组织共同包绕。12周组不锈钢微植体骨结合率及剪切力均大于4周组不锈钢微植体。结论即刻负载下,不锈钢微植体支抗的愈合形式是纤维骨性结合。但其可正常行使功能而保持稳定,而且随着时间延长,其稳定性亦随着增加。Objective To evaluate the stability of stainless steel microimplant anchorage after loaded immediately. Methods One stainless steel microimplant and one titanium alloy microimplant were placed in one side of maxilla and the other side of mandible of eight adult male mongrel dogs at random. 200g of constant force was loaded immediately between two microimplants in maxilla or mandible, two dogs were sacrificed after 4 and 12 weeks for histology. Undercalcified sections longitudinal to the implant were made for histological observation and measurement of the bone contact ratio （BCR） between microimplant and bone interface. Two dogs were sacrificed after 4 and 12 weeks for detecting the shear strength between microimplant and bone interface. Results All microimplants kept stable. The microimplants had favorable biological consistencies with the fiber and bone around them.The BCR and the shear force were both bigger after 4 weeks than 12 weeks. Conclusion The healing modes of stainless steel micmimplant was the fibro-osseous integrations when immediately loaded. But they could all keep stable in this experiment.With time lasting, their stabilities increased.

关 键 词：支抗 微植体 稳定性 骨结合率 剪切力 

分 类 号：R783[医药卫生—口腔医学]