Tashkandi Esam
Department of Prosthetic Dental Sciences, King Saud University, College of Dentistry, P.O. Box 434, Riyadh 11321, Saudi Arabia.
Saudi Dent J. 2009 Oct;21(3):113-6. doi: 10.1016/j.sdentj.2009.10.002. Epub 2009 Oct 29.
The constant quest for finding the ultimate esthetic dental restorative material has led to numerous alternatives. These materials, in addition to possessing optical properties simulating natural teeth, should also have physical properties that can withstand the harsh oral environment. Due to their greater toughness, zirconium oxide materials have been used as a core material for all-ceramic restorations.
The objective of this study was to evaluate the resin-composite micro-shear bond strength to zirconia using different techniques of surface treatment.
Fully sintered zirconia (LAVA, 3M-ESPE, Seefeld, Germany) discs were used in combination with resin-composite (Filtek Supreme, 3M-ESPE, Seefeld, Germany) discs and divided into four groups of surface treatments. The micro-shear bond strength was measured by applying an axial load on the bonded interface until failure occurred. Failure load (N) was determined and the samples were examined under a SEM and the failure type was identified. One-way analysis of variance (ANOVA) was used to analyze the data with the level of significance α = 0.05.
Data analysis revealed significant difference between the different tested surface treatments with the group using sandblasting and coated with an experimental primer showing the highest failure load and a cohesive fracture pattern.
Within the limitations of this in vitro study the use of an experimental primer achieved a better bond strength in combination with air-abrasion particles.
对寻找终极美学牙科修复材料的不断追求催生了众多替代材料。这些材料除了具备模拟天然牙齿的光学性能外，还应具有能承受恶劣口腔环境的物理性能。由于其更高的韧性，氧化锆材料已被用作全瓷修复体的核心材料。
本研究的目的是使用不同的表面处理技术评估树脂复合材料与氧化锆的微剪切粘结强度。
将完全烧结的氧化锆（LAVA，3M-ESPE，德国塞费尔德）圆盘与树脂复合材料（Filtek Supreme，3M-ESPE，德国塞费尔德）圆盘结合使用，并分为四组表面处理。通过在粘结界面上施加轴向载荷直至发生破坏来测量微剪切粘结强度。确定破坏载荷（N），并在扫描电子显微镜下检查样品并确定破坏类型。使用单因素方差分析（ANOVA）对数据进行分析，显著性水平α = 0.05。
数据分析显示，不同测试表面处理之间存在显著差异，使用喷砂并涂覆实验性底漆的组显示出最高的破坏载荷和内聚性断裂模式。
在本体外研究的局限性内，使用实验性底漆与空气磨蚀颗粒结合可获得更好的粘结强度。
