MTAD作为根管冲洗剂的效果评价  

Effect of MTAD as an irrigating agent on the removal of smear layer and apical closure after root canal filling

作　　者：金莉[1] 顾新华[1] 

机构地区：[1]浙江大学医学院附属第一医院口腔科,浙江杭州310003

出　　处：《口腔医学》2018年第1期15-18,共4页Stomatology

基　　金：浙江省自然科学基金(LY16H140001)

摘　　要：目的探讨应用MTAD作为根管冲洗剂去除根管壁玷污层的效果,以及对根管充填后根尖微渗漏的影响。方法采集因正畸或牙周病拔除的前磨牙,截冠后统一工作长度16 mm,按照冲洗液使用的不同,随机分为A、B、C 3组,每组12颗。A:生理盐水;B:MTAD;C:5.25%NaClO+15%EDTA。采用机用Protaper镍钛根管锉进行根管机械预备,分别用相应冲洗液冲洗,根管预备后每组4颗牙齿用于制备扫描电镜标本,观察根管表面玷污层和牙本质小管暴露的情况。每组剩余8颗进行根管充填,1周后,采用液体转移法,测量各样本根管微渗漏。实验数值采用SPSS 19.0软件包进行分析。结果 A组沉积大量玷污层,牙本质小管被遮蔽,B、C组玷污层得到有效的清除,牙本质小管开放。根管充填后,A组和B组之间,A组和C组间的微渗漏值有统计学差异(P<0.05),B组合C组之间无统计学差异(P>0.05),其中A组的微渗漏值最大。结论 MTAD冲洗剂可以替代5.25%NaClO+15%EDTA联用,能有效地去除根管充填过程中产生的玷污层,增强根管充填后的根尖封闭性。Objective To evaluate the effect of MTAD as an irrigating agent on the removal of smear layer and apical closure after root canal filling. Methods 36 human premolars extracted for periodontal disease or orthodontic reasons were collected, their crowns were removed and the working length of canal was unified to be 16 ram. The teeth were divided into 3 groups as group A （NaC1） , group B （MTAD） and group C （5.25% NaCIO ＋ 15% EDTA） with 12 samples each according to the different irrigating agents. The canals were prepared and irrigated with one of the three different irrigating agents respectively. Four samples of each group were split longitudi- nally and a scanning electron microscope was used to observe the smear layer and exposure. Microleakage of root canals was measured with a fluid transport study on the other 8 samples one week after filling.SPSS19.0 software package was used for statistical analysis. Results In group A, dentin tubules were blocked by a remaining smear layer. When treated in Group B and C, smear layers were ab- sent and the dentin tubules were exposed. After root canal filling, significant difference in microleakage was found between group A and group B, group A and group C （P〈0.05） , but no difference was found between group B and C （P〉0.05）. Conclusion MTAD can remove the smear laver and significantly improve the sealability of root canals after filling.

关 键 词：根管冲洗剂 MTAD 玷污层 根尖封闭性 

分 类 号：R781.05[医药卫生—口腔医学]