Sheikh Ghahderijani Mahdiyeh, Khoroushi Maryam, Feiz Atiyeh
Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Dental Materials Research Center, Dental Research Institute, Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Front Dent. 2021 May 25;18:18. doi: 10.18502/fid.v18i18.6325. eCollection 2021.
Calcium hypochlorite (CH) has been recently used as a root canal irrigant. The aim of the present study was to compare the effect of CH and sodium hypochlorite (SH), as root canal irrigants, on the push-out bond strength of fiber posts cemented with an etch-and-rinse resin cement. In this experimental in-vitro study, 40 human anterior teeth with similar root lengths were randomly divided into five groups (N=8) according to the protocol of root canal irrigation as follows: group 1: saline (control); group 2: 2.5% SH; group 3: 5.25% SH; group 4: 2.5% CH; group 5: 5% CH. Before post placement, the post space was irrigated using the same irrigation protocol, and after that, they were irrigated by distilled water. Fiber posts were cemented with All-Bond 3 bonding and Dou-Link Universal cement. After thermocycling (1000 cycles, 5-55°C), a push-out test was performed, and data were analyzed using one-way analysis of variance and Tukey's post-hoc test with SPSS version 23 (α=0.05). The highest and lowest mean bond strengths were detected in groups 2 and 5, respectively. There was no significant difference between group 1 and the SH groups (P>0.05), but the difference between group 1 and the CH groups was significant (P<0.001). There was a significant difference between SH groups and CH groups (P<0.001). Compared to SH, as a root canal irrigant, CH decreased the push-out bond strength of fiber posts cemented with an etch-and-rinse resin cement.
次氯酸钙（CH）最近已被用作根管冲洗剂。本研究的目的是比较作为根管冲洗剂的CH和次氯酸钠（SH）对用酸蚀冲洗树脂水门汀粘结的纤维桩的推出粘结强度的影响。在这项体外实验研究中，根据根管冲洗方案，将40颗牙根长度相似的人前牙随机分为五组（N = 8），如下：第1组：生理盐水（对照组）；第2组：2.5% SH；第3组：5.25% SH；第4组：2.5% CH；第5组：5% CH。在放置桩之前，使用相同的冲洗方案冲洗桩道，之后，用蒸馏水冲洗。使用全粘结3粘结剂和Dou-Link通用水门汀粘结纤维桩。在进行热循环（1000次循环，5 - 55°C）后，进行推出试验，并使用SPSS 23版软件进行单因素方差分析和Tukey事后检验分析数据（α = 0.05）。分别在第2组和第5组中检测到最高和最低平均粘结强度。第1组与SH组之间无显著差异（P>0.05），但第1组与CH组之间差异显著（P<0.001）。SH组与CH组之间存在显著差异（P<0.001）。与作为根管冲洗剂的SH相比，CH降低了用酸蚀冲洗树脂水门汀粘结的纤维桩的推出粘结强度。
