Maluly-Proni A T, Oliveira-Reis B, Jardim V R, Vasconcelos G, Assunção W G, Dos Santos P H
PhD student, Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University - UNESP, Araçatuba, São Paulo, Brazil.
PhD student, Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University - UNESP, Araçatuba, São Paulo, Brazil.
Eur J Prosthodont Restor Dent. 2020 May 28;28(2):65-74. doi: 10.1922/EJPRD_1975Maluly-Proni10.
This in vitro study evaluated the effect of the application and previous photoactivation of bonding adhesives in lithium disilicate ceramics. This was achieved by analyzing the bond strength of the cement-ceramic interface, nanohardness and elastic modulus of bonding adhesives and resin cements. The bonding adhesives used were Scotchbond Multi-Purpose (SBMP); Scotchbond Multi-Purpose light-cured (SBMP+LC); Single Bond 2 (SB2); Single Bond 2 light-cured (SB2+LC); Single Bond Universal (SBU) and Single Bond Universal light-cured (SBU+LC). After luting the ceramic in composite resin blocks, all specimens were subjected to 10,000 thermocycles. Sticks were obtained for the microtensile bonding strength test and the nanohardness and elastic modulus of the bonding adhesive and resin cements. Data were submitted to one-way ANOVA and Fishers tests (α =0.05). The results indicated that the bonding strength and mechanical properties were influenced by the interaction of the bonding adhesive and resin cement. For the mechanical properties analyzed, no statistically significant differences were observed between the groups. Single Bond Universal was the only system that was effective with or without previous light activation. For the other adhesive systems, Scotchbond Multi- Purpose and Single Bond 2, the previous light activation was necessary to optimize the bonding strength of the adhesive interface.
这项体外研究评估了粘结剂在二硅酸锂陶瓷中的应用及先前光活化的效果。这是通过分析粘结剂与陶瓷界面的粘结强度、粘结剂和树脂水门汀的纳米硬度及弹性模量来实现的。所使用的粘结剂有Scotchbond多功能粘结剂（SBMP）；Scotchbond多功能光固化粘结剂（SBMP+LC）；单键2粘结剂（SB2）；单键2光固化粘结剂（SB2+LC）；单键通用粘结剂（SBU）和单键通用光固化粘结剂（SBU+LC）。在将陶瓷粘结到复合树脂块中后，所有试样都经受10000次热循环。制备用于微拉伸粘结强度测试以及粘结剂和树脂水门汀纳米硬度及弹性模量测试的小棒。数据进行单因素方差分析和费舍尔检验（α=0.05）。结果表明，粘结强度和力学性能受粘结剂与树脂水门汀相互作用的影响。对于所分析的力学性能，各组之间未观察到统计学上的显著差异。单键通用粘结剂是唯一无论是否预先进行光活化都有效的系统。对于其他粘结剂系统，即Scotchbond多功能粘结剂和单键2粘结剂，预先进行光活化对于优化粘结剂界面的粘结强度是必要的。
