Lee Hee-Sung, Kwon Tae-Yub
Department of Dental Science, Graduate School, Kyungpook National University, 2-188-1 Samduk-dong, Jung-gu, Daegu 700-412, Korea.
Department of Dental Biomaterials, School of Dentistry and Institute for Biomaterials Research & Development, Kyungpook National University, 2-188-1 Samduk-dong, Jung-gu, Daegu 700-412, Korea.
Materials (Basel). 2017 Sep 2;10(9):1023. doi: 10.3390/ma10091023.
The adhesion of porcelain to zirconia is a key factor in the success of bilayered restorations. In this study, the efficacy of a novel experimental liner (EL) containing zirconia for improved bonding between zirconia and veneering porcelain was tested. Four ELs containing various concentrations (0, 3.0, 6.0, and 9.0 wt %) of zirconia were prepared. Testing determined the most effective EL (EL3 containing 3.0 wt % zirconia) in terms of shear bond strength value ( = 15). Three different bar-shaped zirconia/porcelain bilayer specimens were prepared for a three-point flexural strength (TPFS) test ( = 15): no-liner (NL), commercial liner (CL), and EL3. Specimens were tested for TPFS with the porcelain under tension and the maximum load was measured at the first sign of fracture. The strength data were analyzed using one-way ANOVA and Tukey's test ( = 0.05) as well as Weibull distribution. When compared to NL, the CL application had no effect, while the EL3 application had a significant positive effect ( < 0.001) on the flexural strength. Weibull analysis also revealed the highest shape and scale parameters for group EL3. Within the limitations of this study, the novel ceramic liner containing 3.0 wt % zirconia (EL3) significantly enhanced the zirconia/porcelain interfacial bonding.
瓷与氧化锆的粘结是双层修复成功的关键因素。在本研究中，测试了一种含氧化锆的新型实验性衬层（EL）对改善氧化锆与饰面瓷之间粘结的效果。制备了四种含有不同浓度（0、3.0、6.0和9.0 wt%）氧化锆的EL。测试确定了在剪切粘结强度值方面最有效的EL（含3.0 wt%氧化锆的EL3）（n = 15）。制备了三种不同的条形氧化锆/瓷双层试样用于三点弯曲强度（TPFS）测试（n = 15）：无衬层（NL）、商业衬层（CL）和EL3。对试样进行TPFS测试，使瓷处于拉伸状态，并在出现断裂的第一个迹象时测量最大载荷。使用单因素方差分析和Tukey检验（α = 0.05）以及威布尔分布对强度数据进行分析。与NL相比，应用CL没有效果，而应用EL3对弯曲强度有显著的积极影响（P < 0.001）。威布尔分析还显示EL3组的形状和尺度参数最高。在本研究的局限性范围内，含3.0 wt%氧化锆的新型陶瓷衬层（EL3）显著增强了氧化锆/瓷界面粘结。
