J Adhes Dent. 2014 Apr;16(2):169-76. doi: 10.3290/j.jad.a31809.
To evaluate the effects of a commercial zirconia primer (Choice or RelyX Unicem) on shear bond strength (SBS) of two different resin composite cements - Choice (a conventional bis-GMA-based resin cement) and RelyX Unicem (self-adhesive resin cement) - to zirconia.
Zirconia blocks were manufactured and randomly divided into 5 main groups (n = 20) that received surface treatments and cements as follows: no surface treatment, Choice and RelyX Unicem (groups C and U, resp.); tribochemical silica coating followed by silanization, Choice (group SSC); application of a zirconia primer, Choice and RelyX Unicem (groups ZC and ZU, resp.). Light-curing composite resin cylinders were prepared and bonded on the prepared zirconia blocks using the two different resin cements. Half of the specimens in each group were stored in water for 24 h, and half were aged by 50 days of water storage followed by thermocycling (12,000 cycles between 5°C and 55°C). Thereafter, all of them were submitted to the SBS test. Fourier transmission infrared (FT-IR) spectrum analysis and gas mass spectrometry (MS) analysis were adopted for characterization of the zirconia primer.
Statistical analysis of the SBS test showed that group C presented the lowest SBS values and group SSC the highest (p < 0.01). Artificial aging exerted no influence on the SBS of groups U, SSC, ZC, or ZU. FT-IR analysis suggested that benzene rings and carboxylic groups exist in the zirconia primer. MS analysis detected that 2-hydroxyethyl methacrylate, triethylamine, ethyl-4-dimethylaminobenzoate, ethanol, and water are contained in the primer.
The zirconia primer and self-adhesive resin cement increased the SBS of zirconia.
评估一种商用氧化锆底涂剂（Choice 或 RelyX Unicem）对两种不同树脂水门汀——Choice（一种传统双酚 A 型树脂水门汀）和 RelyX Unicem（自粘接树脂水门汀）与氧化锆粘结强度（SBS）的影响。
制备氧化锆块并随机分为 5 个主要组（n = 20），分别接受以下表面处理和水门汀：无表面处理、Choice 和 RelyX Unicem（组 C 和 U）；采用化学机械硅涂层后硅烷化处理、Choice（组 SSC）；应用氧化锆底涂剂、Choice 和 RelyX Unicem（组 ZC 和 ZU）。用光固化复合树脂圆柱体在制备好的氧化锆块上制备试件，使用两种不同的树脂水门汀进行粘结。每组的一半试件储存在水中 24 小时，另一半试件在经过 50 天的水储存和热循环（5°C 和 55°C 之间 12,000 次循环）后老化。之后，所有试件均进行 SBS 测试。采用傅里叶变换红外（FT-IR）光谱分析和气相质谱（MS）分析对氧化锆底涂剂进行表征。
SBS 测试的统计分析显示，组 C 的 SBS 值最低，组 SSC 的 SBS 值最高（p < 0.01）。人工老化对组 U、SSC、ZC 和 ZU 的 SBS 没有影响。FT-IR 分析表明，氧化锆底涂剂中存在苯环和羧基。MS 分析检测到底涂剂中含有 2-羟乙基甲基丙烯酸酯、三乙胺、乙基-4-二甲基氨基苯甲酸酯、乙醇和水。
氧化锆底涂剂和自粘接树脂水门汀提高了氧化锆的 SBS。
