论文部分内容阅读
目的:建立以亚硝酸钠为示踪物的流体输送模型,探讨Carisolv对根管微渗漏的影响。方法:将70颗离体牙随机分为5组,分别采用Carisolv、2%氯亚明+3%H2O2、2.5%NaclO、5%NaclO(阴性对照)、蒸馏水(阳性对照)预备根管,对根管侧方加压充填后进行桩腔预备,置于模型上,分别于第1、2、4、7、10、15、20、25、30、35、40、45、50、55、60天利用重氮反应检测由冠方向根尖方渗出的亚硝酸钠浓度。采用SPSS11.5软件包对数据进行多因素方差分析。结果:阴性对照组从第1天到第60天均未检测到亚硝酸钠。阳性对照组从第1天就检测到较高浓度的亚硝酸钠,从第1天到第60天亚硝酸钠渗出量显著高于其余4组(P<0.01)。Carisolv组亚硝酸钠渗出量显著低于2%氯亚明+3%H2O2组(P<0.01),与2.5%NaclO组相比,除第25、30、35、40天外,其渗出量均较低(P<0.05)。结论:Carisolv可有效去除玷污层,减少根管微渗漏的发生,达到良好的根管封闭目的。以亚硝酸钠作为示踪物的流体输送模型,可客观、灵敏、准确地评价根管微渗漏。
Objective: To establish a fluid delivery model using sodium nitrite as a tracer to investigate the effect of Carisolv on microleakage of root canal. Methods: 70 isolated teeth were randomly divided into 5 groups. Carisolv, 2% Chloramine + 3% H2O2, 2.5% NaclO, 5% NaclO (negative control) and distilled water (positive control) Root canal lateral pressure filling after the pile cavity preparation, placed on the model, respectively, in the first 1,2,4,7,10,15,20,25,30,35,40,45,50,55,60 The diazotization reaction was used to detect the concentration of sodium nitrite exuding from the apical direction in the coronal direction. Data were analyzed by multivariate analysis of variance using SPSS 11.5 software package. Results: In the negative control group, no sodium nitrite was detected from the 1st day to the 60th day. The positive control group detected a higher concentration of sodium nitrite on the first day. The amount of sodium nitrite excreted from the first day to the 60th day was significantly higher than the other four groups (P <0.01). In Carisolv group, the exudation amount of sodium nitrite was significantly lower than that of 2% chloramine + 3% H2O2 group (P <0.01). Compared with 2.5% NaclO group, Lower (P <0.05). Conclusion: Carisolv can effectively remove smear layer, reduce the incidence of root canal microleakage and achieve the goal of good root canal closure. Fluid delivery models using sodium nitrite as a tracer provide objective, sensitive and accurate assessment of root canal microleakage.