Zanata R L, Navarro M F, Ishikiriama A, da Silva e Souza Júnior M H, Delazari R C
Departamento de Dentística, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Brasil.
Braz Dent J. 1997;8(2):73-8.
The authors evaluated, in vitro, the effects of etching glass ionomer cements prior to the application of a bonding agent and a resin composite on the bond strength of the glass ionomer/resin composite interface. Six glass ionomer cements were tested using the same bonding agent/resin composite system (Scotchbond Multipurpose/Z 100). For each material, 16 specimens were prepared and divided into two groups. Eight of the specimens were not etched while eight were etched with 37% phosphoric acid for 15 seconds. All the materials were used according to the manufacturers' instructions. Glass ionomer cylinders were prepared and were mounted in an assembly apparatus and the bonding agent/resin composite transferred to a demarcated area on the cement surface. The specimens were stored for 24 hours in distilled water at 37 degrees C and thermocycled. After thermocycling, the specimens were placed in a testing machine and a shear load applied with a knife-edged rod at the glass ionomer/resin composite interface. The shear bond strength was calculated and expressed in MPa. Data were analyzed by ANOVA and the Tukey-Kramer test. There were no significant differences among the shear bond strengths of the resin composite to etched and non-etched glass ionomer cements.
作者在体外评估了在应用粘结剂和树脂复合材料之前蚀刻玻璃离子水门汀对玻璃离子/树脂复合材料界面粘结强度的影响。使用相同的粘结剂/树脂复合材料系统（Scotchbond多功能粘结剂/Z 100）对六种玻璃离子水门汀进行了测试。对于每种材料，制备16个样本并分为两组。其中八个样本未进行蚀刻，而另外八个样本用37%的磷酸蚀刻15秒。所有材料均按照制造商的说明使用。制备玻璃离子圆柱体并将其安装在组装设备中，然后将粘结剂/树脂复合材料转移到水门汀表面的划定区域。样本在37℃的蒸馏水中储存24小时并进行热循环处理。热循环处理后，将样本放置在测试机中，在玻璃离子/树脂复合材料界面处用刃口杆施加剪切载荷。计算剪切粘结强度并以MPa表示。数据通过方差分析和Tukey-Kramer检验进行分析。树脂复合材料与蚀刻和未蚀刻的玻璃离子水门汀之间的剪切粘结强度没有显著差异。
