树脂结合简化型二硅酸锂玻璃陶瓷修复体的疲劳失效负荷：陶瓷处理方法的影响。
Fatigue Failure Load of Resin-bonded Simplified Lithium Disilicate Glass-Ceramic Restorations: Effect of Ceramic Conditioning Methods.
出版信息
J Adhes Dent. 2019;21(4):373-381. doi: 10.3290/j.jad.a43000.
PURPOSE
To evaluate the influence of different ceramic surface conditioning methods on the fatigue failure load of adhesively cemented simplified lithium-disilicate glass-ceramic restorations.
MATERIALS AND METHODS
Ceramic (IPS e.max CAD, Ivoclar Vivadent) (Ø = 10 mm; thickness = 1.2 mm) and epoxy resin (Ø = 10 mm; thickness = 2.3 mm) disks were produced. The ceramic bonding surfaces were treated as follows: no etching and MPS-silane primer application only (MN); etching with 10% hydrofluoric acid (HF) for 20 s followed by primer application (HF + MN); HF + universal multimode adhesive application (HF + SU); etching with a one-step etching primer (ME&P); HF + primer + conventional adhesive (HF + MN + PAB). The epoxy resin disks were etched with 10% HF for 20 s followed by a coat of bonding agent (Multilink Primer A+B). Pairs of ceramic/epoxy resin disks were cemented with composite cement (Multilink N, Ivoclar Vivadent). The mean fatigue failure load was determined by the staircase method (100,000 cycles at 20 Hz frequency; initial load = 1435 N; step size = 72 N).
RESULTS
ME&P had the highest fatigue failure load, followed by HF etched groups, while the non-etched condition (MN group) had the lowest. All samples presented radial cracks originating from defects at the conditioned ceramic surface (interface).
CONCLUSION
The simultaneous physicochemical conditioning with one-step self-etching ceramic primer promoted the best fatigue behavior results of the glass-ceramic restorations. It might indicate that this one-step conditioning reduces the number of flaws at the ceramic surface due to the slighter surface alterations than those produced by hydrofluoric acid etching, improving the fatigue behavior.
目的
评估不同陶瓷表面处理方法对简化锂硅玻璃陶瓷修复体黏结固位后疲劳失效负荷的影响。
材料和方法
制作陶瓷（IPS e.max CAD，义获嘉伟瓦登特）（Ø = 10 mm；厚度 = 1.2 mm）和环氧树脂（Ø = 10 mm；厚度 = 2.3 mm）圆盘。陶瓷黏结面的处理如下：仅不酸蚀和 MPS 硅烷偶联剂处理（MN）；用 10%氢氟酸（HF）酸蚀 20 s，然后用偶联剂处理（HF + MN）；HF + 通用多模式黏结剂处理（HF + SU）；用一步法酸蚀剂处理（ME&P）；HF + 偶联剂 + 传统黏结剂处理（HF + MN + PAB）。将环氧树脂圆盘用 10%HF 酸蚀 20 s，然后涂覆黏结剂（Multilink Primer A+B）。用复合黏结剂（Multilink N，义获嘉伟瓦登特）将陶瓷/环氧树脂圆盘对黏结。采用阶梯法（20 Hz 频率下 100,000 次循环；初始负荷 = 1435 N；步长 = 72 N）确定平均疲劳失效负荷。
结果
ME&P 处理的疲劳失效负荷最高，HF 酸蚀组次之，而未酸蚀处理组（MN 组）最低。所有样本均出现源自陶瓷处理面（界面）缺陷的放射状裂纹。
结论
一步法自酸蚀陶瓷处理剂的同时理化处理促进了玻璃陶瓷修复体最佳的疲劳性能。这可能表明，与 HF 酸蚀相比，这种一步处理因表面改变程度较轻而减少了陶瓷表面的缺陷数量，从而提高了疲劳性能。
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