West China Journal of Stomatology ›› 2015, Vol. 33 ›› Issue (6): 638-641.doi: 10.7518/hxkq.2015.06.018

Previous Articles     Next Articles

Effect of Al2O3 sandblasting on the bond strength between 3mol% yttrium-stabilized tetragonal zirconium polycrystal zirconia framework and veneering porcelain

Zeng Qiang, Li Ning, Zhou Yanan, Yan Jiazhen, Liu Wenbo   

  1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China)
  • Received:2015-07-06 Revised:2015-09-10 Online:2015-12-01 Published:2015-12-01

Abstract: Objective The effect of sandblasting on the bond strength between 3mol% yttrium-stabilized tetragonal zirconium polycrystal (3Y-TZP) zirconia framework and veneering porcelain was evaluated. Methods A total of 21 specimens [ (25±1) mm× (3±0.1) mm× (0.5±0.05) mm] were prepared according to ISO 9693. The specimens were then randomly divided into 3 groups. Sandblasting was performed on 2 meshes of Al2O3 particles: group A with mesh 110 and group B with mesh 80. Group C, which was not sandblasted, was the control group. The surface roughness of the zirconia framework, as well as the bond strength between 3Y-TZP zirconia framework and veneering porcelain, was measured. The interface microstructure was observed by scanning electron microscope (SEM), and elemental distribution was detected by energy dispersive spectroscopy (EDS). Results Surface roughness values were (1.272±0.149) μm for group A, (0.622±0.113) μm for group B, and (0.221±0.065) μm for group C. Statistical significance were found among groups (P<0.05). The bond strength values were (28.21±1.52) MPa for group A, (27.71±1.27) MPa for group B, and (24.87±3.84) MPa for group C. Statistical significance was found between group A and group C (P<0.05), whereas the other groups had no statistical significance (P>0.05). Interface adhesion failure was the primary performance. SEM images showed the close interface bonding, and EDS showed that the interface had no obvious element penetration. Conclusion Al2O3 sandblasting can slightly enhance the bond strength between zirconia framework and veneering porcelain.

Key words: sandblasting, zirconia framework, ceramic-porcelain bonding, surface roughness, coefficient of thermal expansion

CLC Number: