Khamverdi Zahra, Karimian Naemeh, Farhadian Maryam, Gheitouli Hamed
Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
Department of Restorative Dentistry, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
Front Dent. 2021 Jul 25;18:27. doi: 10.18502/fid.v18i27.6937. eCollection 2021.
Bond strength of composite restorations plays an important role in their success. This in vitro study evaluated the effect of a hemostatic agent on shear bond strength of universal adhesives. Thirty-six extracted human molars were used in this study. Buccal and lingual surfaces were reduced to obtain flat dentin surfaces and were ground with a silicone paper. The samples were randomly divided into three groups (n=12) based on the application of hemostatic agent: group 1: no contamination (control), group 2: aluminum chloride application, and group 3: ferric sulfate application. Each group was then divided into two subgroups (n=6) for using G-Premio and Single Bond Universal. Resin cylinders (Filtek Z550) were bonded to dentin surfaces according to the manufacturer's instructions. After 1000 thermal cycles, shear load was applied to the specimens using a universal testing machine at a crosshead speed of 1 mm/min until failure. Data were statistically analyzed using two-way ANOVA and Tukey's post-hoc test (α=0.05). There were statistically significant differences in shear bond strength of the three main groups for both G-Premio and Single Bond Universal (P<0.05). When the adhesive systems were compared with each other, G-Premio showed higher shear bond strength than Single Bond Universal (P<0.05). Contamination with hemostatic agents had an adverse effect on the shear bond strength of universal adhesives. Moreover, G-Premio yielded a higher bond strength than Single Bond Universal.
复合树脂修复体的粘结强度对其成功起着重要作用。本体外研究评估了一种止血剂对通用粘结剂剪切粘结强度的影响。本研究使用了36颗拔除的人类磨牙。将颊面和舌面磨除以获得平坦的牙本质表面，并用硅酮纸进行打磨。根据止血剂的应用情况，将样本随机分为三组（n = 12）：第1组：无污染（对照组），第2组：应用氯化铝，第3组：应用硫酸铁。然后每组再分为两个亚组（n = 6），分别使用G-Premio和Single Bond Universal。按照制造商的说明将树脂圆柱体（Filtek Z550）粘结到牙本质表面。经过1000次热循环后，使用万能试验机以1 mm/min的十字头速度对样本施加剪切载荷直至破坏。使用双向方差分析和Tukey事后检验（α = 0.05）对数据进行统计学分析。对于G-Premio和Single Bond Universal，三个主要组的剪切粘结强度均存在统计学显著差异（P < 0.05）。当比较粘结系统时，G-Premio的剪切粘结强度高于Single Bond Universal（P < 0.05）。止血剂污染对通用粘结剂的剪切粘结强度有不利影响。此外，G-Premio的粘结强度高于Single Bond Universal。
