3种窝沟封闭剂微渗漏的实验研究  

Experimental Study on Microleakage of Three Different Fissure Sealants

作　　者：张海亮[1] 赵玉宏[1] 欧晓艳[1] 

机构地区：[1]南昌大学附属口腔医院预防科,江西南昌330006

出　　处：《口腔医学研究》2011年第12期1105-1108,共4页Journal of Oral Science Research

基　　金：南昌市科技局2010-95-58-2

摘　　要：目的:比较3种窝沟封闭剂的微渗漏情况,为选择操作技术难度低且具良好边缘密合性的窝沟封闭剂提供实验依据。方法:收集正畸减数的上颌前磨牙40颗,随机分为5组,每组8颗。即:Helioseal F组、GC Fuji VII组、GC Fuji VII+唾液污染组、Embrace WetBond组、Embrace WetBond+唾液污染组,每组中6颗用50%硝酸银染料浸润2h,切片于体视显微镜下观察微渗漏情况,余下2颗用扫描电镜观察窝沟封闭剂与牙体组织之间的密合度及结合界面的状况。结果:无唾液污染时,3种封闭剂之间微渗漏结果存在显著性差异。扫描电镜观察结果显示Helioseal F完全渗入到窝沟底部,与釉质完全融合在一起。GC Fuji VII及Embrace WetBond与釉质结合良好。唾液污染后,GC Fuji VII与Embrace WetBond与釉质之间的结合界面出现明显微间隙。结论:树脂型封闭剂Heli-oseal F的边缘密合性优良。玻璃离子封闭剂GC Fuji VII和湿法粘结窝沟封闭剂Embrace WetBond的封闭技术难度可降低,边缘密合性尚可,封闭性能有待进一步临床验证。Objective： To provide experimental evidence by study on microleakage of three different fissure sealants.Methods： Forty human maxillary premolars,caries-free for orthodontic reasons were collected and randomly divided into five groups.Fissures were respectively sealed with conventional pit and fissure sealant（Helioseal F）,glass ionomer cement（GC Fuji VII）,GC Fuji VII plus saliva contamination,wetbond sealant（Embrace WetBond）,Embrace WetBond plus saliva contamination.Six teeth in each group were stained with 50% silver nitrate for 2 hours,then were sectioned for evaluation of microleakage.Two other teeth in each group were used to observe the marginal adaptability of fissure sealants and interface condition by scanning electronic microscope.Results： Without saliva contamination,there were significantly differences concerning the microleakage results among three different sealants.Helioseal F was fully penetrated into the bottom of the fissure by SEM,together with the enamel completely.While with saliva contamination,GC Fuji VII and Embrace WetBond had a poor sealing ability,the interface between sealants and enamel appeared significant micro-gap.Conclusion： The pit and fissure sealant Helioseal F had a excellent marginal adaptation.The new glass ionomer sealant GC Fuji VII and wet-bond sealant Embrace WetBond only needed a technology with lower difficulty,and could achieve a acceptable marginal adaptation,their sealing abilities needed further clinical trials.

关 键 词：窝沟封闭 微渗漏 边缘密合性 扫描电镜 

分 类 号：R783.1[医药卫生—口腔医学]