Giti Rashin, Zarkari Reza
Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Indian Prosthodont Soc. 2019 Apr-Jun;19(2):134-140. doi: 10.4103/jips.jips_348_18.
Considering the importance of bond strength of zirconia ceramic to different core materials, this study aimed to evaluate the effect of a new zirconia primer, a mixture of organophosphate and carboxylic acid monomers, on the bond strength of zirconia to three core materials cemented with a self-adhesive resin cement.
The study was done on 36 disk-shaped zirconia specimens in the case (receiving new zirconia primer) and control groups ( = 18) and three core material subgroups ( = 6) (amalgam, nickel-chromium [Ni-Cr], and composite resin). A self-adhesive resin-based luting agent bonded the two parts together. The shear bond strength was tested and the facture modes were determined. Two-way ANOVA and Tukey's honestly significant difference tests were used for data analyses (α = 0.05).
Zirconia primer could not significantly increase the bond strength of zirconia ceramic to different core materials ( = 0.754). Composite resin and amalgam cores showed significantly higher bond strength than Ni-Cr core ( = 0.001). On using zirconia primer, 100% of failures of composite resin cores were cohesive inside the core material, 75% in amalgam core and 100% in Ni-Cr core were adhesive.
The use of new zirconia primer based on organophosphate/carboxylic acid monomers could not enhance the bond strength of zirconia ceramic to different core materials. The bond strength of zirconia to amalgam and composite resin cores was higher than that to Ni-Cr core material.
鉴于氧化锆陶瓷与不同核材料之间粘结强度的重要性，本研究旨在评估一种新型氧化锆底漆（有机磷酸盐和羧酸单体的混合物）对氧化锆与三种用自粘结树脂水门汀粘结的核材料之间粘结强度的影响。
本研究在实验组（接受新型氧化锆底漆）和对照组（n = 18）以及三个核材料亚组（n = 6）（汞合金、镍铬合金[Ni-Cr]和复合树脂）的36个圆盘形氧化锆试件上进行。一种基于自粘结树脂的粘结剂将两部分粘结在一起。测试剪切粘结强度并确定断裂模式。采用双向方差分析和Tukey真实显著性差异检验进行数据分析（α = 0.05）。
氧化锆底漆不能显著提高氧化锆陶瓷与不同核材料之间的粘结强度（P = 0.754）。复合树脂核和汞合金核的粘结强度显著高于Ni-Cr核（P = 0.001）。使用氧化锆底漆时，复合树脂核100%的破坏发生在核材料内部，汞合金核为75%，Ni-Cr核100%为粘结破坏。
基于有机磷酸盐/羧酸单体的新型氧化锆底漆不能提高氧化锆陶瓷与不同核材料之间的粘结强度。氧化锆与汞合金和复合树脂核的粘结强度高于与Ni-Cr核材料的粘结强度。
