不同根管封闭剂根尖封闭效能的体外研究

发布时间：2018-05-15 18:12

本文选题：根管治疗 + 根管封闭剂　；参考：《口腔医学研究》2017年10期

【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(P0.05),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(P0.05);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。
[Abstract]:Objective: to compare the apical sealing efficacy of three root canal sealants after root filling, and to provide experimental evidence for selecting appropriate root canal sealant to reduce microleakage in clinical work. Methods: 40 permanent teeth of single root canal were collected. After the root canal was prepared to F3 by Crown-Down technique, they were randomly divided into 3 experimental groups: group A (group A) and group B (group B). Roeko Sealal (group C) combined with continuous wave hot gum vertical compression technique was used to fill the root canal. A control group: control group D (blank group) did not use root filling paste only hot gum filling root canal (10 in each group). After filling the root canal, the paste was cured completely. The 3% nitric acid demineralization and ethanol gradient dehydration were carried out by using Indian ink. The length of dye infiltrating into the root tip was observed and recorded under the stereoscopic microscope. The density between the root filling material and the inner wall of root canal dentin was observed by scanning electron microscope. Results there was significant difference in microleakage of root tip between two groups (P 0.05). It was found that the penetration length of dye in group A was smaller than that in group B, and that in group B was higher than that in group C (P 0.05), and that in group B was higher than that in group B (P < 0.05), and that in group B was significantly higher than that in group B (P < 0.05), and that in group B was higher than that in group B (P < 0.05). The difference was not statistically significant. Scanning electron microscope showed that the tightness between the filling material and the root canal inner wall of root canal was the best in the W iRoot SP group. Conclusion: it is suggested that the new root canal sealant iRoot SP can effectively reduce the microleakage of root tip under the condition of external experiment, and it has certain clinical application value.
【作者单位】：新疆医科大学第二附属医院口腔科;
【分类号】：R781.05

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