Carisolv对根管微渗漏的影响

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。

Effect of Carisolv on endodontic microleakage

PURPOSE: To evaluate the effect of Carisolv on endodontic microleakage by establishing a fluid transport model using sodium nitrite as tracer.METHODS: Seventy extracted teeth were randomly divided into 5 groups,all the root canals were prepared with different chemical reagents,including Carisolv,3%hydrogen peroxide+ 2%tosylchloramide sodium,2.5% sodium hypochlorite,5% sodium hypochlorite(negative control)and distilled water(positive control),post spaces were prepared after cold lateral condensation,the samples were put on the model,concentration of sodium nitrite which penetrated from the coronal to the apical end was measured by diazo reaction at 1,2,4,7,10,15,20,25,30,35,40,45,50,55 and 60 day.The data were analyzed by ANOVA using SPSS 11.5 software package.RESULTS: Sodium nitrite was not detected in negative control group from 1 day to 60 days.High concentration of sodium nitrite was detected in positive control group at first day,concentration of sodium nitrite was higher than that of other four groups from 1day to 60 days(P<0.01).Concentration of sodium nitrite in Carisolv group was significantly lower than that of 3%hydrogen peroxide+ 2%tosylchloramide sodium group(P<0.01),also lower than that of 2.5% sodium hypochlorite group(P<0.05),except at 25,30,35 and 40 days.CONCLUSIONS: Carisolv can remove the smear layer,decrease the endodontic microleakage,seal the root canal better.The fluid transport model using sodium nitrite as tracer can be used to evaluate the endodontic microleakage objectively,sensitively and exactly.