不同根管封闭剂根尖封闭效能的体外研究  

Effect of Different Root Canal Sealers on Apical Microleakage In Vitro

作　　者：葛翘诚 尹艳娇 丁欣欣[1] 吴佩玲[1] 

机构地区：[1]新疆医科大学第二附属医院口腔科,新疆乌鲁木齐830063

出　　处：《口腔医学研究》2017年第10期1064-1067,共4页Journal of Oral Science Research

摘　　要：目的:比较3种根管封闭剂根充后的根尖封闭效能,为临床工作中选择恰当的根管封闭剂减少微渗漏提供实验依据。方法:收集单根管恒牙40颗,采用Crown-Down技术根管预备至F3号后随机分为3个实验组即:A组(iRoot SP)、B组(AH-Plus)、C组(RoekoSeal)分别配伍连续波热牙胶垂直加压技术充填根管;一个对照组:D组(空白组)不使用根充糊剂仅热牙胶充填根管(每组10颗)。根管充填后待糊剂完全固化,使用印度墨汁行微渗漏染色实验、3%硝酸脱矿、不同浓度乙醇梯度脱水、制成透明牙后在体视显微镜下观察并记录染料渗入根尖部的长度。扫描电镜下观察根充材料与根尖区根管牙本质内壁间的密合程度。结果:4组间根尖部微渗漏的差异有统计学意义(P<0.05),两两比较后发现A组染料的渗入长度小于B、C、D组,且与B、C、D组间的差异有统计学意义(P<0.05);B组染料的渗入长度大于C组,且差异无统计学意义。扫描电镜显示:iRoot SP组充填材料与根尖区根管牙本质内壁间的密合程度最好。结论:在本体外实验条件下提示新型根管封闭剂iRoot SP能够有效减少根尖微渗漏的产生,具有一定的临床应用价值。Objective.. To evaluate the apical microleakage with three root canal sealers after root canal filling, and to provide experimental evidence for selecting the appropriate root canal sealers to reduce microleakage in clinic work. Methods： Forty straight single root canal teeth were prepared by crown--down technique, and then divided randomly into four experimental groups （10 teeth in each group）. Group A was filled with iRoot SP. Group B was filled with AH--plus. Group C was filled with Roekoseal. Group D was the control group. All teeth were immersed in India ink, demineralized, and dehydrated. The apical microleakages were observed with microscope, and the length of stained apical was recorded. Meanwhile, ultrastrucatral evaluation between filling materials and dentin was observed with scanning electron microscope. Results： There were significant difference in the leaked lengths among four groups （P^0.05）. The length of group A was less than those of B, C and D group. There was statistically significant difference among B, C, and D group for apical leakage （P〈0.05）. The length of group B was longer than that of group C, but there was not significant difference in the leaked lengths between two groups. Scanning e- lectron microscope revealed that group A （iRoot SP） had the best bonding between the sealer and dentin among four groups. Conclusion.. iRoot SP can effectively reduce the microleakage in our study, and it has value in clinical appli cation.

关 键 词：根管治疗 根管封闭剂 根尖微渗漏 根尖封闭性 

分 类 号：R781.05[医药卫生—口腔医学]