Sciasci Plínio, Abi-Rached Filipe Oliveira, Adabo Gelson Luis, Baldissara Paolo, Fonseca Renata Garcia
Doctoral student, Department of Diagnosis and Surgery, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil.
Adjunct Professor, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil.
J Prosthet Dent. 2015 Mar;113(3):212-9. doi: 10.1016/j.prosdent.2014.09.012. Epub 2014 Nov 18.
Because zirconia is a glass-free material, alternative surface treatments such as airborne-particle abrasion or silica coating should be used for long-term bonding. However, these surface treatments in combination with different bonding agents and luting cements have not yet been studied.
The purpose of the study was to evaluate the effect of surface treatments on the shear bond strength (SBS) of luting cements to Y-TZP ceramic.
Zirconia disks (N=240) were airborne-particle abraded with the following particles (n=48): 50 μm Al2O3; 120 μm Al2O3; 30 μm silica-coated Al2O3 (Rocatec Soft); 120 μm Al2O3+110 μm silica-coated Al2O3 (Rocatec Plus); and Rocatec Plus. After silanization of the zirconia surface, composite resin disks were bonded with (n=12) RelyX Luting 2; RelyX ARC; RelyX U100; and Panavia F. The bonded specimens were thermocycled (10 000 cycles) and tested for SBS. Failure mode was determined with a stereomicroscope (×20). The morphology and elemental composition of airborne-particle abraded surfaces were evaluated with scanning electron microscopy (×500) and energy-dispersive x-ray spectroscopy (×50).
Surface treatments, cements, and their interaction were significant (P<.001). For RelyX ARC, Rocatec Soft and Rocatec Plus provided the highest SBS. In general, surface treatments did not influence the SBS of RelyX U100 and Panavia F. Regardless of the cement, no significant difference was found between 50 μm and 120 μm Al2O3 particles, between Rocatec Soft and Rocatec Plus, or between Rocatec Plus and 120 μm Al2O3 particles+Rocatec Plus. All groups showed adhesive failures. Different particle sizes provided differences in morphological patterns. The elemental composition comprised Al and Al/Si for alumina and silica-abraded zirconia.
Particle size did not influence the SBS of the groups abraded exclusively with alumina or silica-coated particles. RelyX ARC was more surface-treatment dependent than RelyX U100 or Panavia F.
由于氧化锆是一种无玻璃材料，对于长期粘结应采用诸如空气颗粒研磨或二氧化硅涂层等替代表面处理方法。然而，这些表面处理方法与不同粘结剂和粘结水门汀的组合尚未得到研究。
本研究的目的是评估表面处理对粘结水门汀与Y-TZP陶瓷之间剪切粘结强度（SBS）的影响。
用以下颗粒对氧化锆盘（N = 240）进行空气颗粒研磨（n = 48）：50μm氧化铝；120μm氧化铝；30μm二氧化硅涂层氧化铝（Rocatec Soft）；120μm氧化铝 + 110μm二氧化硅涂层氧化铝（Rocatec Plus）；以及Rocatec Plus。氧化锆表面进行硅烷化处理后，用（n = 12）RelyX Luting 2、RelyX ARC、RelyX U100和Panavia F粘结复合树脂盘。对粘结后的试件进行热循环（10000次循环）并测试其SBS。用体视显微镜（×20）确定失效模式。用扫描电子显微镜（×500）和能量色散X射线光谱仪（×50）评估空气颗粒研磨表面的形态和元素组成。
表面处理、水门汀及其相互作用具有显著性（P <.001）。对于RelyX ARC，Rocatec Soft和Rocatec Plus提供了最高的SBS。一般来说，表面处理不影响RelyX U100和Panavia F的SBS。无论使用哪种水门汀，在50μm和120μm氧化铝颗粒之间、Rocatec Soft和Rocatec Plus之间、或Rocatec Plus与120μm氧化铝颗粒 + Rocatec Plus之间均未发现显著差异。所有组均显示为粘结失败。不同粒径在形态模式上存在差异。氧化铝和二氧化硅研磨的氧化锆的元素组成包括铝以及铝/硅。
粒径对仅用氧化铝或二氧化硅涂层颗粒研磨的组的SBS没有影响。与RelyX U100或Panavia F相比，RelyX ARC对表面处理的依赖性更强。
