Celik Davut, Ozalp Koca Ayse Tuba, Kosar Tugba, Tasdemir Tamer
Department of Endodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey.
Department of Endodontics, Faculty of Dentistry, Bahcesehir University, IstanbulTurkey.
Eur Oral Res. 2021 Sep 1;55(3):146-151. doi: 10.26650/eor.2021922696.
The purpose of the present study was to investigate the effect of the different irrigant combinations used in final irrigation on the push-out bond strength of root canal sealers that have different compositions.
In total 60 dentinal slices in 1 mm thickness were collected from 15 extracted mandibular premolar teeth; 4 slices from each tooth. 3 canal-like artificial cavities were opened on each dentinal slice. Samples were divided into 4 experimental groups, each of which consisted of 15 samples. In group 1, samples were immersed in 5.25% NaOCl and 17% EDTA solutions respectively; in group 2, immersed in 5.25% NaOCl and 2% CHX solutions respectively; in group 3, immersed in 5.25% NaOCl, 17% EDTA and 2% CHX solutions respectively; and in group 4 immersed in distilled water. After drying with absorbent papers, each cavity in dentinal slice sample was filled with different sealer (Endoseal MTA, Tech Biosealer Endo or AH Plus). Two days later, the push-out bond examination was performed.
AH Plus showed higher push-out bond strength value in two combinations (group 2 and 3) in which final irrigants contained CHX (p<0.001). Dentinal push-out bond strengths of root canal sealers from Endoseal MTA and Tech BioSealer Endo were not affected by final irrigant (p=0.965).
Using CHX after NaOCl in final irrigant increases push-out strength of epoxy resinbased sealer but, did not create any difference in dentinal push-out bond strength of calcium silicate-based sealers.
本研究旨在探讨在最终冲洗中使用不同冲洗剂组合对具有不同成分的根管封闭剂推出粘结强度的影响。
从15颗拔除的下颌前磨牙中收集了总共60片1毫米厚的牙本质切片；每颗牙齿4片。在每片牙本质切片上开3个类似根管的人工腔。样本分为4个实验组，每组由15个样本组成。第1组样本分别浸泡在5.25%次氯酸钠和17%乙二胺四乙酸溶液中；第2组分别浸泡在5.25%次氯酸钠和2%氯己定溶液中；第3组分别浸泡在5.25%次氯酸钠、17%乙二胺四乙酸和2%氯己定溶液中；第4组浸泡在蒸馏水中。用吸水纸干燥后，牙本质切片样本中的每个腔用不同的封闭剂（Endoseal MTA、Tech Biosealer Endo或AH Plus）填充。两天后，进行推出粘结检测。
在最终冲洗剂含有氯己定的两种组合（第2组和第3组）中，AH Plus显示出更高的推出粘结强度值（p<0.001）。Endoseal MTA和Tech BioSealer Endo根管封闭剂的牙本质推出粘结强度不受最终冲洗剂的影响（p=0.965）。
在最终冲洗中，次氯酸钠之后使用氯己定可提高环氧树脂基封闭剂的推出强度，但对硅酸钙基封闭剂的牙本质推出粘结强度没有产生任何差异。
