Chen Min-Min, Kou Peng, Xie Xiao-Li, Wang Xiang-Zhu, Hou Dong-Lan
Department of Endodontics, Xiangya Stomatological Hospital, Central South University. Changsha 410078, Hunan Province, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2018 Oct;27(5):467-471.
To study the effect of root canal wall moisture and filling techniques on the sealability of iRoot sp.
Sixty-two undamaged extracted human single-rooted teeth with fully developed apex were selected and prepared by crown-down technique. Two teeth were selected randomly to observe dentin tubules, opening, the residual teeth were randomly assigned to 3 groups: group A (wet), group B (slightly moist),group C(dry).The roots were further divided into 4 subgroups, group a: iRoot sp sealer without a core material (bulk-fill); group b: iRoot sp sealer with single cone obturation techniques; group c: iRoot sp sealer with heated gutta-purcha vertical pressure; group d: iRoot sp sealer with cold gutta-percha lateral compression technique. Glucose microleakage were measured in each group by glucose oxidase method. The differences in distribution of each group were analyzed with SPSS 19.0 software package.
Group A and group B always showed the maximum and minimum amount of glucose penetration in the whole experimental process, and the difference was statistically significant at 28d (P<0.05). Under the same degree of moisture of root canal wall, glucose leakage of subgroup Aa was significantly higher than that of subgroup Ab and Ac at 15 d; and significantly higher than Ab, Ac, Ad at 21 d and 28 d(P<0.05). In group B and C, the subgroups a, b, c, d had no significant difference from each other during the experimental process(P>0.05).
iRoot sp sealer has the best sealing effect when root canals were slightly moist. When the root canal wall is completely dry or slightly moist, the sealability of iRoot sp bulk-fill is similar to that of iRoot sp sealer with gutta-percha filling technique.
研究根管壁湿度和充填技术对iRoot sp封闭性的影响。
选取62颗根尖完全发育的完整拔除的人单根牙，采用冠向下技术进行预备。随机选取两颗牙观察牙本质小管、开口情况，其余牙齿随机分为3组：A组（湿润）、B组（轻度湿润）、C组（干燥）。将牙根进一步分为4个亚组，a组：iRoot sp封闭剂无核心材料（大容量充填）；b组：iRoot sp封闭剂采用单锥充填技术；c组：iRoot sp封闭剂采用热牙胶垂直加压；d组：iRoot sp封闭剂采用冷牙胶侧方加压技术。采用葡萄糖氧化酶法测量每组的葡萄糖微渗漏情况。使用SPSS 19.0软件包分析每组分布的差异。
在整个实验过程中，A组和B组始终显示出最大和最小的葡萄糖渗透量，在28天时差异具有统计学意义（P<0.05）。在根管壁湿度相同的情况下，Aa亚组在15天时的葡萄糖渗漏明显高于Ab和Ac亚组；在21天和28天时明显高于Ab、Ac、Ad亚组（P<0.05）。在B组和C组中，a、b、c、d亚组在实验过程中彼此无显著差异（P>0.05）。
根管轻度湿润时，iRoot sp封闭剂的封闭效果最佳。当根管壁完全干燥或轻度湿润时，iRoot sp大容量充填的封闭性与牙胶充填技术的iRoot sp封闭剂相似。
