Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, WA.
Department of Prosthodontics, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN.
J Prosthodont. 2019 Mar;28(3):305-309. doi: 10.1111/jopr.13024. Epub 2019 Feb 8.
To evaluate the rebonding strength of ceramics to titanium alloy after disassembling by heat treatment.
A total of 40 titanium alloy (titanium-6 aluminum-4 vanadium) disks (4.0 × 6.6 mm) and 20 zirconia (Lava Plus) disks were manufactured using computer-aided design and computer-aided manufacturing (CAD/CAM) technology. Twenty heat-pressed lithium disilicate glass-ceramic (IPS e.max Press LT) disks were fabricated and used as controls. Bonding protocol for each specimen surface was performed according to manufacturer's instructions. Specimens (n = 10) of zirconia/titanium alloy (ZR) and lithium disilicate/titanium alloy (LD) were bonded using adhesive resin cement (RelyX Ultimate) and then subjected to a heat treatment (HT, 320°C, 2 minutes) to disassemble the bonding complex, cleaned with aluminum oxide airborne-particle abrasion, and rebonded following the initial protocol, group ZRHT and group LDHT, respectively. After 5000 cycles of thermal cycling, a shear bond test was conducted. A universal testing machine was used at a 5 mm/min crosshead speed. Failed specimens were examined with stereomicroscopy at 10× magnification to identify the mode of failure. One-way ANOVA and Tukey HSD tests were applied for statistical analysis of the shear bond strength data, with statistical significance at α = 0.05.
The mean ± SD bond strength values ranged from 28.3 ± 7.2 to 45.9 ± 9.7 MPa. Statistically significant lower shear bond strength values were obtained from the LD group (p = 0.002, F = 5.89), while no statistically significant differences in bond strength were observed between the ZR and ZRHT groups (p > 0.05). Failure mode was predominantly mixed-type failure pattern for all specimens.
Heat and abrasion surface treatment increased the bond strength of lithium disilicate glass-ceramics cemented to titanium alloy, but no effect was observed on zirconia/titanium alloy bonding.
评估经过热处理拆卸后陶瓷与钛合金的再结合强度。
使用计算机辅助设计和计算机辅助制造（CAD/CAM）技术制造了总共 40 个钛合金（钛-6 铝-4 钒）圆盘（4.0×6.6 毫米）和 20 个氧化锆（Lava Plus）圆盘。制作了 20 个热压锂二硅酸玻璃陶瓷（IPS e.max Press LT）圆盘作为对照。按照制造商的说明对每个试件表面进行粘结协议。将氧化锆/钛合金（ZR）和锂二硅酸锂/钛合金（LD）的试件（n=10）用粘结树脂水泥（RelyX Ultimate）粘结，然后进行热处理（HT，320°C，2 分钟）以拆开粘结复合物，用氧化铝气载喷砂处理清洁，然后按照初始协议重新粘结，分别为组 ZRHT 和组 LDHT。经过 5000 次热循环后，进行剪切粘结试验。以 5 毫米/分钟的十字头速度使用万能试验机。使用立体显微镜以 10×放大倍数检查失效的试件，以确定失效模式。应用单向方差分析和 Tukey HSD 检验对剪切粘结强度数据进行统计分析，以α=0.05为统计学意义。
平均±SD 粘结强度值范围为 28.3±7.2 至 45.9±9.7 MPa。LD 组的剪切粘结强度值明显较低（p=0.002，F=5.89），而 ZR 组和 ZRHT 组之间的粘结强度无统计学差异（p＞0.05）。所有试件的失效模式均主要为混合失效模式。
热和磨损表面处理增加了锂二硅酸玻璃陶瓷粘结到钛合金的粘结强度，但对氧化锆/钛合金粘结没有影响。
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