Diefenderfer K E, Reinhardt J W
University of Iowa, Department of Operative Dentistry, Iowa City 52242, USA.
Oper Dent. 1997 Mar-Apr;22(2):50-6.
This study compared the shear bond strengths of amalgam to dentin using two amalgam alloys and five adhesive resin systems. One hundred extracted human third molars were flattened occlusally to expose dentin. Dentin surfaces were treated with one of five adhesive resins: All-Bond 2, Amalgambond Plus, Amalgambond Plus with HPA Powder, OptiBond, and Resinomer. Tytin (spherical) or Dispersalloy (admixed) amalgam was condensed onto the treated dentin surface through a Teflon split mold. The samples were stored 7-10 days and thermocycled before shear testing using a Zwick Materials Testing Machine. Two-way ANOVA revealed significant differences among the 10 groups (P < 0.05). The combination of Tytin/OptiBond produced the highest bond strength to dentin (14.17 MPa), while Dispersalloy/Amalgambond Plus produced the lowest (3.89 MPa). In general, the filled resin systems (Amalgambond Plus with HPA Powder, OptiBond, Resinomer) produced higher bond strengths than the unfilled systems (All-Bond 2, Amalgambond Plus). Additionally, for four of the five resins, bond strengths were higher with Tytin than with Dispersalloy, although differences were statistically significant in only two groups.
本研究使用两种汞合金和五种粘结树脂系统比较了汞合金与牙本质之间的剪切粘结强度。选取100颗拔除的人类第三磨牙，将其咬合面磨平以暴露牙本质。牙本质表面用以下五种粘结树脂之一进行处理：全粘结2型、汞合金粘结增强型、添加HPA粉末的汞合金粘结增强型、OptiBond和树脂单体。通过聚四氟乙烯分模将Tytin（球形）或Dispersalloy（混合型）汞合金冷凝在处理过的牙本质表面。样本储存7 - 10天并进行热循环处理，然后使用Zwick材料试验机进行剪切测试。双向方差分析显示10组之间存在显著差异（P < 0.05）。Tytin/OptiBond组合对牙本质产生的粘结强度最高（14.17兆帕），而Dispersalloy/汞合金粘结增强型产生的粘结强度最低（3.89兆帕）。总体而言，填充树脂系统（添加HPA粉末的汞合金粘结增强型、OptiBond、树脂单体）产生的粘结强度高于未填充系统（全粘结2型、汞合金粘结增强型）。此外，对于五种树脂中的四种，Tytin产生的粘结强度高于Dispersalloy，不过只有两组差异具有统计学意义。
