Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwang-Ju, Korea.
J Prosthet Dent. 2011 May;105(5):315-22. doi: 10.1016/S0022-3913(11)60060-7.
Various surface treatments of zirconia have been recommended for veneering ceramics. However, it has not been determined which of these treatments produces the highest bond strength.
This study examined the effects of various surface treatments on the shear bond strength of zirconia and veneering ceramic.
Square-shaped (5 × 10 × 10 mm) zirconia (Everest) specimens were divided into 4 groups (n=8) according to surface treatment as follows: group C, grinding with #320 diamond disc (control); group A, airborne-particle abrasion with 110 μm Al(2)O(3); group L, application of liner (Cerabien); and group AL, airborne-particle abrasion with 110 μm Al(2)O(3) and application of liner. A cylinder of veneering ceramic (2.4 mm in diameter and 3 mm in height) (Cerabien) was fabricated and fired on the zirconia specimens. The shear bond strength was tested using a universal testing machine. The data were analyzed statistically using a 1-way ANOVA and Tukey's multiple comparisons test (α=.05). The interface and fractured surfaces of the specimens were also evaluated by field emission scanning electron microscopy (FE-SEM).
The mean and SD values for the shear bond strength of the groups ranged from 27.87 ± 3.59 MPa (for group L) to 36.63 ± 2.96 MPa (for group A). The 1-way ANOVA revealed a significant difference between groups (P=.001). The airborne-particle abrasion group showed significantly higher bond strength than liner applied groups (L, AL) (P<.05). The SEM revealed that liner-applied groups (L, AL) showed primarily adhesive failure. Complete delamination and microspaces were also observed in the liner-applied groups.
The mean in vitro shear bond strength of veneering ceramic on zirconia treated with airborne-particle abrasion was significantly higher than that subjected to liner-applied treatments.
已经推荐了各种氧化锆表面处理方法来涂覆陶瓷。然而，尚未确定哪种处理方法可产生最高的粘结强度。
本研究检查了各种表面处理方法对氧化锆和涂覆陶瓷的剪切粘结强度的影响。
将方形（5×10×10mm）氧化锆（Everest）试件根据表面处理分为 4 组（n=8）：组 C，用#320 金刚石盘研磨（对照）；组 A，用 110μmAl2O3 进行喷丸处理；组 L，应用衬层（Cerabien）；组 AL，用 110μmAl2O3 进行喷丸处理和应用衬层。在氧化锆试件上制造并烧制一个直径为 2.4mm、高 3mm 的涂覆陶瓷圆柱体。使用万能试验机测试剪切粘结强度。使用单向方差分析和 Tukey 多重比较检验（α=.05）对数据进行统计分析。还通过场发射扫描电子显微镜（FE-SEM）评估试件的界面和断裂表面。
各组的剪切粘结强度的平均值和标准差范围为 27.87±3.59MPa（组 L）至 36.63±2.96MPa（组 A）。单因素方差分析显示组间存在显著差异（P=.001）。喷丸处理组的粘结强度明显高于衬层应用组（L、AL）（P<.05）。SEM 显示衬层应用组（L、AL）主要表现为黏附性破坏。在衬层应用组中也观察到完全分层和微间隙。
与衬层应用处理相比，经喷丸处理的氧化锆上涂覆陶瓷的体外平均剪切粘结强度显著更高。
