Can the silane heat treatment influence the bond durability between resin cements and a dental ceramic?

ABSTRACT Objective Evaluate the influence of silane heat treatment in bond durability between two resin cements and CAD/CAM feldspathic ceramic. Methods 40 feldspathic ceramic blocks were obtained, and were duplicated in microhybrid composite. All ceramic blocks were etched with 10% hydrofluoric acid for 20 s and received application of silane agent. The blocks were randomizedinto eight groups (n=5) according to the surface treatments and luting agents: P- Panavia F; PAg- Panavia F + Aging; HP- Heat Treatment + Panavia F; HPAg- Heat Treatment + Panavia F + Aging; R- RelyX ARC; Rag- RelyX ARC + Aging; HR- Heat Treatment + RelyX ARC; HRAg- Heat Treatment + RelyX ARC + Aging. The heat treatment was performed in furnace at 100 °C for 2 min. All blocks were cemented and cut to obtain samples with adhesive area of 1 mm2. Aging was performed with 10000 thermal cycles. The samples were subjected to microtensile bond strength test. Results The three-way ANOVA test revealed a significant interaction between cement versus heat treatment (p=0.001) and heat treatment versus thermal cycling (p=0.001) indicating that there was a change in bond strength due to surface treatment and aging. Conclusion Therefore, the heat treatment of the silane at 100 ºC for 2 minutes obtained higher values of bond strength between the resin cement and a feldspathic ceramicafter aging.

摘要
研究目的：评估硅烷热处理对两种树脂水门汀（resin cements）与CAD/CAM（计算机辅助设计/计算机辅助制造，Computer Aided Design/Computer Aided Manufacturing）长石质陶瓷之间粘结耐久性的影响。
研究方法：获取40块长石质陶瓷块，并将其复制为微混合复合材料（microhybrid composite）试件。所有陶瓷块均用10%氢氟酸（hydrofluoric acid）蚀刻20秒，并涂布硅烷偶联剂（silane agent）。根据表面处理方式与粘结剂种类，将试件随机分为8组（n=5）：P组：Panavia F；PAg组：Panavia F+老化处理；HP组：热处理+Panavia F；HPAg组：热处理+Panavia F+老化处理；R组：RelyX ARC；Rag组：RelyX ARC+老化处理；HR组：热处理+RelyX ARC；HRAg组：热处理+RelyX ARC+老化处理。热处理在100℃的炉中进行2分钟。将所有试件粘结后切割为粘结面积为1mm²的试样。老化处理采用10000次热循环（thermal cycles）。随后对试样进行微拉伸粘结强度测试（microtensile bond strength test）。
研究结果：三因素方差分析（three-way ANOVA）结果显示，粘结剂与热处理之间存在显著交互作用（p=0.001），且热处理与热循环之间亦存在显著交互作用（p=0.001），表明表面处理与老化处理会对粘结强度产生影响。
研究结论：综上，在100℃下对硅烷偶联剂进行2分钟热处理，可使树脂水门汀与长石质陶瓷之间的粘结强度在老化处理后获得更高数值。