Nasim Iffat, Neelakantan Prasanna, Subbarao C V
Department of Conservative Dentistry and Endodontics, Saveetha Dental College, Saveetha University , Chennai, Tamil Nadu , India.
Acta Odontol Scand. 2014 Jul;72(5):376-9. doi: 10.3109/00016357.2013.841987. Epub 2013 Nov 21.
To evaluate the effect of two gutta percha solvents on the bond strength of two resin-based sealers to root canal dentin.
Root canals of extracted single rooted human mandibular premolars (n = 60) were decoronated and instrumented with a rotary NiTi system to an apical size of 40 and randomly divided into three groups (n = 20) based on the chemical treatment: Group I, saline (control); group II, Xylene and group III, Endosolv E. All groups were divided into two sub-groups (n = 10) based on the root filling material: sub-group A, epoxy resin sealer (AH Plus); sub-group B, methacrylate resin sealer (Epiphany). Roots were then sectioned and push-out tests were performed. The data was analysed using two-way analysis of variance (ANOVA) and a multiple comparison test (p = 0.05).
There was a significant difference in bond strength of both sealers between the control and test groups (p < 0.05). The bond strength of the epoxy resin sealer (sub-group A) in group II was significantly lower than in group III (p < 0.05). However, there was no significant difference between groups II and III for the methacrylate resin sealer (sub-group b) (p > 0.05).
Gutta Percha solvents had an adverse effect on bond strengths of resin sealers to root canal dentin. This was dependent on the chemistry of the solvent and the sealer.
评估两种牙胶溶剂对两种树脂类根管封闭剂与根管牙本质粘结强度的影响。
将拔除的单根人下颌前磨牙（n = 60）的根管去冠，用旋转镍钛系统预备至根尖尺寸40，根据化学处理方法随机分为三组（n = 20）：第一组，生理盐水（对照组）；第二组，二甲苯；第三组，Endosolv E。根据根管充填材料，所有组再分为两个亚组（n = 10）：A亚组，环氧树脂封闭剂（AH Plus）；B亚组，甲基丙烯酸酯树脂封闭剂（Epiphany）。然后将牙根切片并进行推出试验。数据采用双向方差分析（ANOVA）和多重比较检验（p = 0.05）进行分析。
对照组和试验组中两种封闭剂的粘结强度均有显著差异（p < 0.05）。第二组中环氧树脂封闭剂（A亚组）的粘结强度显著低于第三组（p < 0.05）。然而，甲基丙烯酸酯树脂封闭剂（B亚组）在第二组和第三组之间没有显著差异（p > 0.05）。
牙胶溶剂对树脂封闭剂与根管牙本质的粘结强度有不利影响。这取决于溶剂和封闭剂的化学性质。
