纳米根管充填材料根尖封闭能力的实验研究  

Assessment of apical sealing of nanomaterials

作　　者：赵瑜[1] 任吉芳[2] 

机构地区：[1]温州医学院附属口腔医院,325000 [2]山西医科大学第二医院口腔科

出　　处：《现代口腔医学杂志》2007年第3期291-292,共2页Journal of Modern Stomatology

摘　　要：目的观察纳米材料根充后根尖微渗漏情况,评价其根尖封闭能力。方法30颗离体单根管牙牙根,随机分为三组,每组10个,预备完成的根管用牙胶尖和一种根管糊剂、采用侧方加压法进行充填。根据染料在牙根中的渗入深度,评价根尖微渗漏情况。结果三种材料的根尖微渗漏有显著差异(P<0.01);n-ZO组的根尖微渗漏最小,n-HA组次之,ZOE组最大。结论纳米氧化锌糊剂和纳米羟磷灰石糊剂具有良好的根尖封闭性,可以作为根管封闭剂用于根管充填。Objective To examine the apical sealing ability of two nanomaterial as root canal sealers. Methods Thirty roots of single - rooted teeth were prepared using step- back technique and randomly and equally divided into three groups. The root canals were ohturated with gutta-percha and sea｜ed with zinc oxide - eugertol sealer （ZOE, served as the control group）, nano- zinc- oxide sealer （n - ZO）, and nanohydroxyapatite sealer （n - HA）, respectively. The filled roots were stained with ink, decalcified and dehydrated, and then placed in methysalicylate to make them transparent. The linear dye penetration was assessed using a stereomicroscope under X16 magnification. The apical sealing of the sealers was assessed according to the length of dye penetration. Results The distance of dye penetration of n - ZO was the smallest among the three sealers, while the distance of dye penetration of n- HA was smaller than that of ZOE. Conclusion Nano - zinc - oxide and nanohydroxyapatite have favorable apical sealing ability and are suitable as root canal sealers.

关 键 词：纳米材料 微渗漏 染料渗透 

分 类 号：R318.08[医药卫生—生物医学工程]