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目的:研究不同桩道预备时机对两种根管封闭剂充填的根管封闭效果的影响。方法:70个单根管离体牙,采用逐步后退法预备根管,随机分为2组,分别采用AHPlus和Cortisomol根管封闭剂加牙胶尖侧方加压充填根管,对两组标本分别进行即刻和延迟一周桩道预备,每组抽取5颗牙为阴性对照不进行桩道预备,观察根尖部染料微渗漏情况。结果:AHPlus组较Cortisomol组能够更好地封闭根尖,但两者微渗漏值无明显统计学差异。延迟桩道预备组根尖微渗漏值显著高于阴性对照组和即刻预备组,差异有统计学意义。结论:即刻桩道预备能够更好地保护根尖封闭效果。
OBJECTIVE: To study the effect of different timing of preloading on root canal sealing of two kinds of root canal sealers. Methods: Seventy-one single-rooted incisors were divided into two groups according to the gradual retreat method. The root canals were pressure-filled with AHPlus and Cortisomol root canal sealant plus gypenosides respectively. Two groups of specimens Immediate and delayed one-week post-preparation, respectively, for each group to take five teeth as a negative control is not for the preparation of the stool to observe the apical microdissection of the dye. Results: Compared with Cortisomol group, AHPlus group could close the apical root well, but there was no significant difference between the two groups. The microdialysis value in delayed staple preparation group was significantly higher than that in negative control group and immediate preparation group, the difference was statistically significant. CONCLUSIONS: Immediate stake preparation is better able to protect the apical seal.