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http://dx.doi.org/10.5392/JKCA.2018.18.10.361

Effect of Hydrofluoric Acid Etching on Shear Bond Strength between Resin Cement and Zirconia cores  

Kim, Sa-Hak (경동대학교 치기공학과)
Kim, Sun-Moon (경동대학교 치기공학과)
Kim, Chong-Kyen (경동대학교 호텔경영학과)
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Abstract
The purpose of this study was to evaluate the influence of hydrofluoric acid etching treatment on the bonding strength of yttria-stabilized tetragonal zirconia polycrystal(Y-TZP). Four groups of zirconia-resin cement specimens were prepared; 1) ZGS group (zirconia, no treatment), 2) ZGSH group (zirconia, hydrofluoric acid etching treatment) 3) H-ZGS group (Hybrid zirconia, no treatment) 4) H-ZGSH group (Hybrid zirconia, hydrofluoric acid etching treatment). The shear bond strength between zirconia and porcelain was measured using a Instron Universal Testing Machine(Model DBBP-500, Instron Corporation, Kyonggi, Korea). Data were statistically analyzed using independent t-test and two-way ANOVA(${\alpha}=0.05$). The ceramic-resin cement bonding strength was affected by hydrofluoric acid etching treatment(p<0.05). Digital microscope examination of the fracture surface showed mixed failures with adhesive and cohesive types in hydrofluoric acid etching treatment with treated zirconia and hybrid zirconia groups.
Keywords
Bond Strength; Hydrofluoric Acid Etching Treatment; Zirconia;
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