热效应对生物陶瓷糊剂在根管不同部位充填效果的影响  

Influence of thermal effect on filling effect of bioceramic paste in different parts of root canal

作　　者：王瑛慧[1] 曹玉昕 刘纯溢 王茹 刘大勇[1] Wang Yinghui;Cao Yuxin;Liu Chunyi;Wang Ru;Liu Dayong(Department of Dentistry and Endodontics,Stomatological Hospital of Tianjin Medical University,Tianjin 300070,China)

机构地区：[1]天津医科大学口腔医院牙体牙髓科,300070

出　　处：《国际生物医学工程杂志》2022年第1期9-14,共6页International Journal of Biomedical Engineering

摘　　要：目的研究热效应对生物陶瓷糊剂结合热凝牙胶垂直加压法在根管不同部位充填效果的影响。方法将40颗单根管牙样本随机分为对照组、iRoot SP组、10 s组、20 s组,每组10颗。所有牙样本在去除牙冠后根管预备至0.04锥度。对照组行AH-plus糊剂结合热凝牙胶垂直加压充填;iRoot SP组行iRoot SP单尖充填;10 s组及20 s组使用iRoot SP单尖充填结合热凝牙胶垂直加压充填,并分别在使用热凝牙胶前以180℃分别加热10 s及20 s。使用亚甲基蓝染色法、扫描电子显微镜(SEM)观察法、牙科显微镜观察法分析充填后根管中上段和根尖1/3处的缝隙发生情况。结果对于根尖1/3处的充填,10 s组和20 s组均无明显缝隙出现,且染料侵染深度与对照组之间的差异均无统计学意义(均P>0.05)。对于根管中上段的充填,iRoot SP结合单尖充填出现缝隙的概率较高。结论短时间的高温加热不会影响iRoot SP对于根尖1/3处的封闭效果;对于根管中上段,iRoot SP单尖充填结合热凝牙胶垂直加压法的充填效果优于iRoot SP单尖法充填。Objective To study the effect of thermal effect on the filling effect of bioceramic paste combined with thermal gel gutta-percha vertical obturation method in different parts of root canal.Methods Forty single-root canal teeth samples were randomly and randomized divided into the control group,the iRoot SP group,the 10 s group and the 20 s group.All tooth samples were root canal prepared to 0.04 taper after crown removal.The control group received AH-plus paste combined with thermal gel gutta-percha vertical obturation.The iRoot SP group received iRoot SP single-point filling.The 10 s group and 20 s group received iRoot SP single-point filling combined with thermal gel gutta-percha vertical obturation,in which the root canal of the two groups were heated at 180°C for 10 s and 20 s,respectively,before using the thermosetting gutta-percha.Methylene blue staining,scanning electron microscope(SEM)observation and dental microscope observation were used to analyze the occurrence of gaps in the middle and upper segment of the root canal and the apical 1/3 of the root canal after filling.Results For the filling in the apical 1/3 of the root canal,no obvious gap appeared in the 10 s group and the 20 s group,and there was no significant difference between the dye infection depth and the control group(all P>0.05).For the filling of the middle and upper segment of the root canal,the probability of porosity is higher when using iRoot SP combined with single-point filling.Conclusions Short-term high temperature heating will not affect the sealing effect of iRoot SP on the apical 1/3 of the root canal.For the middle and upper segment of the root canal,the filling effect of iRoot SP single-point filling combined with thermal gel gutta-percha vertical obturation method is better than that of iRoot SP single-point filling.

关 键 词：生物陶瓷糊剂 热效应 垂直加压法 单尖法 根管填充 根尖微渗漏 缝隙率 

分 类 号：R783.1[医药卫生—口腔医学]