不同冲洗液对根管冠方微渗漏影响的体外研究

摘要

AIM:To evaluate the influence of different chemical irrigants on coronal microleakage after root canal filling. METHODS:45 premolar teeth with single canal were randomly divided into 3 groups ( n=15 ) . The teeth were instrumented with protaper and root canals of the 3 groups were respectively irrigated with 20 g/L chloramine (Group 1), 20 g/L Sodium hypochlorite(Group 2) and 170 g/L MTAD(Group 3). Then each tooth canal was obtura-ted byh warm vertical condensation technique and coronal microleakage was determined by color staining method. RESULTS:Group 3 showed significantly less microleakage than group 1 and group 2 (P<0. 05), while there was no significant difference between group 1 and group 2 (P>0. 05) . CONCLUSION:170 g/L MTAD is more effective than 20 g/L chloramine and 20 g/L Sodium hypochlorite in removing smear layer and reducing the microleakage after root canal obturation.%目的：：比较3种根管冲洗液对冠方微渗漏的影响。方法：选择45个单根管前磨牙(弯曲度为10~20°),随机分为3组(n=15)：20 g/L氯亚明组、20 g/L次氯酸钠组、170 g/L MTAD组,以 ProTape预备根管,各组分别用不同冲洗液冲洗根管,热垂直加压法充填根管,用染色法比较不同冲洗液对根管冠方封闭性的影响。结果：不同冲洗液对充填后根管冠方微渗漏影响不同,次氯酸钠组渗漏量略小于氯亚明组(P>0.05),MTAD组冲洗后产生的微渗漏最小(P<0.05)。结论：20 g/L氯亚明、20 g/L次氯酸钠,能有效去除碎屑和玷污层,但清洁能力不如170 g/L MTAD；170 g/L MTAD能去除玷污层,减少冠渗漏的发生。