Department of Prosthodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey.
Lasers Med Sci. 2013 Sep;28(5):1233-9. doi: 10.1007/s10103-012-1201-5. Epub 2012 Sep 13.
The purpose of this study was to evaluate the influence of different surface treatments (sandblasting, acid etching, and laser irradiation) on the shear bond strength of lithium disilicate-based core (IPS Empress 2) and feldspathic ceramics (VITA VM 9). One hundred ceramic discs were divided into two groups of 50 discs each for two ceramic systems: IPS Empress 2 (group I) and VITA VM 9 (group II). Each of the two groups was further divided into five surface treatment groups (ten each) as follows: group SB, sandblasting with alumina particles (50 μm); group HF, 5 % hydrofluoric acid etching; group L, Er:YAG laser irradiation (distance, 1 mm; 500 mJ; 20 Hz; 10 W; manually, noncontact R14 handpiece); group SB-L, sandblasting + Er:YAG laser; and group HF-L, 5 % hydrofluoric acid + Er:YAG laser. Luting cement (Panavia 2.0) was bonded to the ceramic specimens using Teflon tubes. After 24 h of water storage, a shear bond strength test was performed using a universal testing machine at a crosshead speed of 0.5 mm/min. The data were analyzed with a two-way analysis of variance (ANOVA) and Tukey's honestly significant difference tests (α = 0.05). The two-way ANOVA indicated that the shear bond strength was significantly affected by the surface treatment methods (p < 0.05), but there was no significant interaction between the ceramic systems. Group SB-L had the highest mean values for each ceramic system. Sandblasting, followed by Er:YAG laser irradiation, enhanced the bond strength, indicating its potential use as an alternative method. The atomic force microscopic evaluation revealed that group SB had the most distinct sharp peaks among the groups.
本研究旨在评估不同表面处理（喷砂、酸蚀和激光照射）对锂硅基核（IPS Empress 2）和长石质陶瓷（VITA VM 9）剪切粘结强度的影响。将 100 个陶瓷圆盘分为两组，每组 50 个圆盘，用于两种陶瓷系统：IPS Empress 2（组 I）和 VITA VM 9（组 II）。每组进一步分为 5 个表面处理组（每组 10 个），如下所示：组 SB，用氧化铝颗粒喷砂（50 μm）；组 HF，5%氢氟酸蚀刻；组 L，Er:YAG 激光照射（距离 1 mm；500 mJ；20 Hz；10 W；手动，非接触 R14 手持件）；组 SB-L，喷砂+Er:YAG 激光；组 HF-L，5%氢氟酸+Er:YAG 激光。用聚四氟乙烯管将粘结水泥（Panavia 2.0）粘结到陶瓷标本上。水储存 24 小时后，使用万能试验机以 0.5 mm/min 的十字头速度进行剪切粘结强度测试。使用双向方差分析（ANOVA）和 Tukey Honestly 显著差异检验（α=0.05）对数据进行分析。双向 ANOVA 表明，剪切粘结强度受到表面处理方法的显著影响（p<0.05），但陶瓷系统之间没有显著的相互作用。对于每种陶瓷系统，组 SB-L 的平均值最高。喷砂后，Er:YAG 激光照射增强了粘结强度，表明其作为替代方法具有潜在用途。原子力显微镜评估显示，组 SB 在各组中具有最明显的尖锐峰。
