Aboushelib Moustafa N, Kleverlaan Cornelis J, Feilzer Albert J
Department of Materials Science, Academic Center for Dentistry Amsterdam, Louwesweg 1, 1066 EA Amsterdam, The Netherlands.
J Prosthet Dent. 2007 Nov;98(5):379-88. doi: 10.1016/S0022-3913(07)60123-1.
Establishing a strong and a stable adhesive bond between yttrium, partially stabilized, tetragonal zirconia, polycrystal materials (Y-TZP) and resin luting agents has proven to be difficult using conventional surface roughening and coating methods.
The purpose of this study was to evaluate the zirconia-resin bond strength and durability using a selective infiltration-etching technique.
Seventy-two Y-TZP discs (19.5 x 3 mm) were airborne-particle abraded with 110-mum aluminum oxide particles and divided into 4 groups (n=18). One test group received the selective infiltration-etching surface treatment. Three commercial adhesive systems (Panavia F 2.0, RelyX ARC, and Bistite II DC) were used to bond the airborne-particle-abraded zirconia specimens to preaged restorative composite resin discs (Filtek Z250). Panavia was used to bond the selective infiltration-etched specimens. The bonded specimens were cut into microbars (6 x 1 x 1 mm), and a microtensile bond strength test (MTBS measured in MPa) was conducted immediately, after 1 week, 2 weeks, 3 weeks, and after 1 month of water storage (5 microbars/disc/time interval/group, n = 450 microbars/group). Scanning electron microscopy was used to examine the fractured microbars. The density (g/cm(3)) and the 4-point flexure strength (MPa) of the selective infiltration-etched and airborne-particle-abraded specimens were measured to evaluate the effect of selective infiltration etching on the structural integrity of the Y-TZP specimens. A repeated measures ANOVA with 1 within-subjects factor (time, 5 levels) and 1 between-subjects factor (technique, 4 levels) was used to analyze the data (alpha=.05). Pairwise comparisons were made using the Bonferroni post hoc test.
There were significant differences in the initial MTBS values (MPa) between the 4 bonding techniques (P<.001). Airborne-particle-abraded specimens bonded with either Panavia F 2.0, RelyX ARC, or Bistite II DC resulted in a mean (SD) bond strength of 23.3 (2.4), 33.4 (2.1), 31.3 (2.8) MPa, respectively, while the highest bond strength of 49.8 (2.7) MPa was achieved for the selective infiltration-etched specimens bonded with Panavia F 2.0. There was a significant interaction between water storage time and the bonding technique (P<.001) as reduction in MTBS values was observed with time, except for the specimens bonded with Panavia (selective infiltration-etched and airborne-particle-abraded specimens). Additionally, the observed failure mode was primarily cohesive for the selective infiltration-etched specimens, in contrast to the other groups, which showed primarily an interfacial failure.
For the materials used in this study and under the same testing conditions, selective infiltration etching is a reliable method for establishing a strong and durable bond with zirconia-based materials.
事实证明，使用传统的表面粗糙化和涂层方法，在部分稳定的四方多晶氧化钇（Y-TZP）材料与树脂粘结剂之间建立牢固且稳定的粘结是困难的。
本研究的目的是使用选择性渗透蚀刻技术评估氧化锆-树脂的粘结强度和耐久性。
72个Y-TZP圆盘（19.5×3毫米）用110微米的氧化铝颗粒进行空气颗粒研磨，并分为4组（n = 18）。一个测试组接受选择性渗透蚀刻表面处理。使用三种商用粘结系统（Panavia F 2.0、RelyX ARC和Bistite II DC）将空气颗粒研磨的氧化锆标本粘结到预老化的修复复合树脂圆盘（Filtek Z250）上。Panavia用于粘结选择性渗透蚀刻的标本。将粘结的标本切成微条（6×1×1毫米），并在立即、储存1周、2周、3周和储存1个月的水后（每组每次间隔5个微条，n = 450个微条/组）进行微拉伸粘结强度测试（MTBS，以MPa为单位测量）。使用扫描电子显微镜检查断裂的微条。测量选择性渗透蚀刻和空气颗粒研磨标本的密度（克/立方厘米）和四点弯曲强度（MPa），以评估选择性渗透蚀刻对Y-TZP标本结构完整性的影响。使用具有1个受试者内因素（时间，5个水平）和1个受试者间因素（技术，4个水平）的重复测量方差分析来分析数据（α = 0.05）。使用Bonferroni事后检验进行成对比较。
4种粘结技术之间的初始MTBS值（MPa）存在显著差异（P <.001）。用Panavia F 2.0、RelyX ARC或Bistite II DC粘结的空气颗粒研磨标本的平均（SD）粘结强度分别为23.3（2.4）、33.4（2.1）、31.3（2.8）MPa，而用Panavia F 2.0粘结的选择性渗透蚀刻标本的粘结强度最高，为49.8（2.7）MPa。储存时间与粘结技术之间存在显著相互作用（P <.001），因为除了用Panavia粘结的标本（选择性渗透蚀刻和空气颗粒研磨标本）外，MTBS值随时间降低。此外，观察到的失效模式主要是选择性渗透蚀刻标本的内聚性失效，与其他组相反，其他组主要表现为界面失效。
对于本研究中使用的材料并在相同测试条件下，选择性渗透蚀刻是与氧化锆基材料建立牢固且持久粘结的可靠方法。
