不同渗透时间对窝沟封闭边缘封闭性能的影响  

The influence of penetration time on the marginal seal of pit and fissure sealants

作　　者：周红艳[1] 张晓旻[1] 曹灵[1] 王珏[1] 梅予锋[1] ZHOU Hongyan;ZHANG Xiaomin;CAO Ling;WANG Jue;MEI Yufeng(Department of Pediatric Dentistry,The Affiliated Stomatological Hospital of Nanjing Medical University,Jiangsu Province Key Laboratory of Oral Diseases,Jiangsu Province Engineering Research Center of Stomatological Translational Medicine,Nanjing 210029,China)

机构地区：[1]南京医科大学附属口腔医院儿童口腔科,江苏省口腔疾病研究重点实验室,江苏省口腔转化医学工程研究中心,江苏南京210029

出　　处：《口腔医学》2021年第7期599-602,共4页Stomatology

基　　金：江苏高校优势学科建设工程(2018-87)。

摘　　要：目的研究窝沟封闭剂渗透时间对窝沟封闭边缘微渗漏、渗透程度及超微结构的影响。方法取离体牙50颗,随机分成5组,每组10颗,每个样本咬合面窝沟处行窝沟釉质成形术,然后酸蚀,冲洗干燥。组1~组5直接涂布封闭剂,组1即刻固化,组2~组5分别停留15 s、30 s、45 s和60 s后光照固化。采用1%亚甲蓝浸染法和体视显微镜观察封闭剂与牙面间的密合程度及封闭剂的渗透程度。用原子力显微镜(atomic force microscope,AFM)观察即刻组及30 s组窝沟封闭剂牙齿交界面的树脂形成情况。结果窝沟封闭剂牙面停留30 s及以上组的窝沟封闭剂渗透程度显著优于其他渗透时间组,原子力显微镜观察显示即刻组及30 s组树脂突明显,排列密集,清晰规则。结论光照前封闭剂涂布后可适当停留30 s。Objective To evaluate the influence of penetration time on the microleakage,penetration ability and atomic force microscope(AFM)of pit and fissure sealants in vitro.Methods Fifty extracted third molars of human mandibular were randomly divided into five groups with ten in each group.Occlusal surfaces of the teeth in all groups were prepared using enameloplasty,etched,rinsed and dried.In group 1-5,the fissure sealant was applied onto the surface and allowed to penetrate for 0 s,15 s,30 s,45 s and 60 s respectively.Each tooth was subjected to dye immersion(1%methylene blue).Microleakage and penetration ability were examined after sectioning.The quality of tag formation was examined using an AFM.Results The penetration time of 30 s,45 s and 60 s resulted in significantly more(P<0.05)penetration depths compared to 0 s and 15 s.AFM showed that 0 s group and 30 s group had obvious,dense and regular resin tags.Conclusion The findings reveal that it should permit a penetration time around 30 s before light-cure in clinical treatment.

关 键 词：窝沟封闭 渗透时间 渗透程度 微渗漏 原子力显微镜 

分 类 号：R781.05[医药卫生—口腔医学]