Wendler Michael, Belli Renan, Panzer Reinhard, Skibbe Daniel, Petschelt Anselm, Lohbauer Ulrich
Dental Clinic 1-Operative Dentistry and Periodontology, Research Laboratory for Dental Biomaterials, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen 91054, Germany.
Department of Restorative Dentistry, Faculty of Dentistry, University of Concepción, Concepción 4070369, Chile.
Materials (Basel). 2016 Jul 7;9(7):547. doi: 10.3390/ma9070547.
The aim of this study was to compare the effect of different mechanical surface treatments and chemical bonding protocols on the tensile bond strength (TBS) of aged composite. Bar specimens were produced using a nanohybrid resin composite and aged in distilled water for 30 days. Different surface treatments (diamond bur, phosphoric acid, silane, and sandblasting with Al₂O₃ or CoJet Sand), as well as bonding protocols (Primer/Adhesive) were used prior to application of the repair composite. TBS of the specimens was measured and the results were analyzed using analysis of variance (ANOVA) and the Student-Newman-Keuls test (α = 0.05). Mechanically treated surfaces were characterized under SEM and by profilometry. The effect of water aging on the degree of conversion was measured by means of FTIR-ATR spectroscopy. An important increase in the degree of conversion was observed after aging. No significant differences in TBS were observed among the mechanical surface treatments, despite variations in surface roughness profiles. Phosphoric acid etching significantly improved repair bond strength values. The cohesive TBS of the material was only reached using resin bonding agents. Application of an intermediate bonding system plays a key role in achieving reliable repair bond strengths, whereas the kind of mechanical surface treatment appears to play a secondary role.
本研究的目的是比较不同机械表面处理和化学粘结方案对老化复合材料拉伸粘结强度（TBS）的影响。使用纳米混合树脂复合材料制作棒状试件，并在蒸馏水中老化30天。在应用修复复合材料之前，采用了不同的表面处理方法（金刚石车针、磷酸、硅烷以及用Al₂O₃或CoJet Sand喷砂）以及粘结方案（底漆/粘结剂）。测量试件的TBS，并使用方差分析（ANOVA）和Student-Newman-Keuls检验（α = 0.05）对结果进行分析。对经过机械处理的表面进行扫描电子显微镜（SEM）表征和轮廓测定。通过傅里叶变换红外衰减全反射光谱（FTIR-ATR）测量水老化对转化率的影响。老化后观察到转化率有显著提高。尽管表面粗糙度轮廓有所变化，但在机械表面处理之间未观察到TBS有显著差异。磷酸蚀刻显著提高了修复粘结强度值。仅使用树脂粘结剂才能达到材料的内聚TBS。应用中间粘结系统在实现可靠的修复粘结强度方面起着关键作用，而机械表面处理的类型似乎起次要作用。
