摘要
目的:比较不同粒度金刚砂车针预备的牙体与RelyX Unicem粘固剂粘接强度的影响。方法:采用5种不同粒度车针对牙面进行牙体预备,根据最终使用车针粒度的不同将离体牙试件分为5组,测量其粗糙度,并将牙本质与RelyX Unicem粘固剂粘接,测试各组剪切强度。结果:5种粒度车针预备后的牙面粗糙度间存在显著差异(P<0.05),RelyX Unicem粘固剂与各组牙面的粘接强度除超细与极细粒度车针组间无差异外,其他各组间也存在显著差异(P<0.05)。结论:随着车针粒度的减少,牙面粗糙度降低,而RelyX Unicem粘固剂与各组牙面的粘接强度增加。
Objective：The aim of this study was to evaluate the effect of different grit sizes of diamond burs on the shear bond strength between prepared dentin and RelyX Unicem cement. Methods： According to the type of the latest diamond burs used for the finishing of tooth preparation, all the prepared teeth were divided into 5 groups. The dentin surface roughness was measured, Then all the dentin plates were bonded with RelyX Unicem cement and shear bond strength were measured. Results： There were significant difference among the 5 groups in surface roughness （P〈 0.05） . The shear bond strength were also difference in 5 groups beside the types of the extra-fine and super-fine diamond burs （P 〈 0.05） . Conclusion： With the grit size of diamond bur derease, the dentin surface roughness and bond strength between dentin and RelyX Unicem decrease.
出处
《继续医学教育》
2011年第7期37-39,共3页
Continuing Medical Education
基金
天津市口腔医院院级课题
