Bioscience Research Center, Nova Southeastern University, Fort Lauderdale, FL 33328-2018, USA.
Dent Mater. 2011 Aug;27(8):779-85. doi: 10.1016/j.dental.2011.03.018. Epub 2011 Apr 30.
To compare long-term microtensile bond strength of zirconia, surface-modified via a novel treatment, to current surface conditioning methods for zirconia, when resin bonded to dental composite.
Two ProCAD (porcelain) and 10 sintered ZirCAD (ZrO(2)) blocks (18 mm × 14 mm × 12 mm) were obtained from manufacturers. Twelve Herculite XRV composite blocks were fabricated (18 mm × 14 mm × 12 mm). Bonding surface of blocks was polished through 1200-grit SiC and air-abraded (50 μm alumina, 0.28MPa, 20s). Blocks were then separated into six groups: (1) porcelain (control), HF-etched/silane-treated, (2) ZrO(2), tribochemical-coated/silane-treated, (3) ZrO(2), primer-treated, (4) ZrO(2), modified via novel 3.2 nm silica layer/silane-treated, (5) ZrO(2), modified via novel 5.8nm silica layer/silane-treated, and (6) ZrO(2), modified via novel 30.4 nm silica layer/silane-treated. Blocks were bonded to composite using Clearfil Esthetic cement. Blocks were stored in distilled water (37°C, 24h), then cut into microtensile bars (n=8/gp), then bond strengths were measured using a universal testing machine at 0, 1, 3, and 6 months. All groups were statistically analyzed (ANOVA, Tukey's, p<0.05).
At 6 months (aging), all silica seed layer specimens displayed microtensile bond strength similar to CoJet specimens but less than that of silane-modified dental porcelain.
The deposition of a silica layer on zirconia resulted in similar or superior long-term resin bond strength when compared to traditional silanation and bonding techniques for zirconia but lower than that for silane-treated dental porcelain.
比较经新型处理的氧化锆与目前氧化锆表面处理方法的长期微拉伸粘结强度，以将树脂粘结至牙科复合材料上。
从制造商处获得两块 ProCAD（瓷）和 10 块烧结的 ZirCAD（ZrO2）块（18mm×14mm×12mm）。制作了 12 块 Herculite XRV 复合块（18mm×14mm×12mm）。通过 1200 目 SiC 对块的粘结面进行抛光，并进行空气喷砂处理（50μm 氧化铝，0.28MPa，20s）。然后将块分为六组：（1）瓷（对照）、HF 蚀刻/硅烷处理，（2）ZrO2、涂覆的机械化学处理/硅烷处理，（3）ZrO2、预处理，（4）经新型 3.2nm 二氧化硅层/硅烷处理改性的 ZrO2，（5）经新型 5.8nm 二氧化硅层/硅烷处理改性的 ZrO2，和（6）经新型 30.4nm 二氧化硅层/硅烷处理改性的 ZrO2。使用 Clearfil Esthetic 水泥将块粘结至复合材料。将块储存在蒸馏水中（37°C，24h），然后切成微拉伸棒（n=8/gp），然后使用万能试验机在 0、1、3 和 6 个月时测量粘结强度。对所有组进行统计分析（ANOVA、Tukey's、p<0.05）。
在 6 个月（老化）时，所有二氧化硅种子层样品显示的微拉伸粘结强度与 CoJet 样品相似，但低于硅烷处理的牙科瓷。
与传统的氧化锆硅烷化和粘结技术相比，在氧化锆上沉积一层二氧化硅会导致类似或更高的长期树脂粘结强度，但低于硅烷处理的牙科瓷。
