Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Special Administrative Region PR China.
Dent Mater. 2012 Aug;28(8):863-72. doi: 10.1016/j.dental.2012.04.023. Epub 2012 May 31.
To evaluate and compare three novel coupling agents: 2-hydroxyethyl methacrylate, itaconic acid and oleic acid to two silane coupling agents, one commercial silane product and 3-acryloxypropyltrimethoxysilane on the bond durability of resin composite to zirconia.
Zirconia samples were silica-coated by air abrasion and each of the five coupling agents was then applied to give five test groups. Resin composite stubs were bonded onto the conditioned zirconia surfaces. The samples were stored: dry storage, 30 days in water and thermocycled to give a total of fifteen test groups. The shear bond strengths were determined using a universal testing machine and data analyzed by two-way ANOVA and Tukey HSD (p<0.05) with shear bond strength as dependent variable and storage condition and primers as independent variables. The bond formation of the five coupling agents to zirconia was examined by X-ray photoelectron spectroscopy (XPS).
Two-way ANOVA analysis showed that there was a significant difference for different primers (p<0.05) and different storage conditions (p<0.05) on the shear bond strength values measured. XPS analysis showed a shift in binding energy for O(1s) after priming with the five coupling agents which revealed different bond formations related to the functional groups of the coupling agents.
The shear bond strength values measured for all coupling agents after water storage and thermocycling exceed the minimum shear bond strength value of 5MPa set by ISO. The silane coupling agent, 3-acryloxypropyltrimethoxysilane, showed the highest bond strength of the three storage conditions.
评估和比较三种新型偶联剂：2-羟乙基甲基丙烯酸酯、衣康酸和油酸与两种硅烷偶联剂、一种商业硅烷产品和 3-丙烯酰氧基丙基三甲氧基硅烷对树脂复合材料与氧化锆的键合耐久性的影响。
通过喷砂处理对氧化锆样品进行硅烷化处理，然后将五种偶联剂中的每一种应用于样品，共得到五个实验组。将树脂复合材料试块粘结到预处理后的氧化锆表面上。将样品分别进行干储存、30 天水储存和热循环处理，共得到十五个实验组。使用万能试验机测定剪切粘结强度，以剪切粘结强度为因变量，以储存条件和偶联剂为自变量，采用双因素方差分析和 Tukey HSD 进行数据分析（p<0.05）。采用 X 射线光电子能谱（XPS）分析五种偶联剂与氧化锆的键合形成。
双因素方差分析表明，不同的偶联剂（p<0.05）和不同的储存条件（p<0.05）对测量的剪切粘结强度值有显著影响。XPS 分析表明，五种偶联剂预处理后 O(1s)的结合能发生了偏移，这揭示了与偶联剂官能团相关的不同键合形成。
所有偶联剂在水储存和热循环后测量的剪切粘结强度值均超过 ISO 设定的 5MPa 的最小剪切粘结强度值。在三种储存条件下，硅烷偶联剂 3-丙烯酰氧基丙基三甲氧基硅烷表现出最高的粘结强度。
