Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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EFFECTS OF RESIN CEMENTS, CERAMIC SURFACE TREATMENTS AND THERMOCYCLING ON SHEAR BOND STRENGTH OF IPS EMPRESS CERAMIC

레진시멘트, 표면처리 및 열순환에 따른 IPS Empress의 전단결합강도

  • Han, Jeong-Min (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
  • You, Young-Dae (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
  • Lee, Yong-Keun (Department of Dental Biomaterials, College of Dentistry, Seoul National University) ;
  • Im, Mi-Kyung (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
  • Lee, Su-Jong (Department of Conservative Dentistry, College of Dentistry, Wonkwang University)
  • 한정민 (원광대학교 치과대학 치과보존학교실) ;
  • 유영대 (원광대학교 치과대학 치과보존학교실) ;
  • 이용근 (서울대학교 치과대학 치과생체재료학교실) ;
  • 임미경 (원광대학교 치과대학 치과보존학교실) ;
  • 이수종 (원광대학교 치과대학 치과보존학교실)
  • Published : 1999.09.05
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Abstract

This study evaluated the shear bond properties of IPS Empress glass ceramic to enamel and dentin surfaces with three ceramic surface treatments, and three resin cements. The influence of thermocycling was also investigated. The purpose of this study was to investigate the influences of resin cements, ceramic surface treatments, and thermocycling on shear bond properties. Ninety freshly extracted, noncarious human molars were selected for this study. The surface treatments of ceramic were etching <5.0% hydrofluoric acid, application of silane coupling agents(Tokuso Ceramic Primer, Clearfil porcelain bond, Monobond-S), and the combination of the two methods. Empress cylinders were bonded to enamel and dentin surfaces with three kinds of resin cements(Bistite resin cement, Panavia 21, Variolink). The specimens were aged in $37^{\circ}C$ distilled water for 24 hours. Half of the specimens were then thermocycled 500times between $5^{\circ}C$ and $55^{\circ}C$ with a dwell time of 15 seconds. Each specimen was debonded in shear mode and measured shear bond properties by using the universal testing machine(Zwick 020, Germany). The data were analyzed by SPSS/PC+(one-way ANOVA, Scheffe' s test and t-test). The results were as follows : 1. Without thermocyling, there was significant difference of shear bond strength to enamel surface between Bistite Resin Cement and Panavia 21 in case of etched and silane-treatment(p<0.05). 2. Without thermocyling, the shear bond strength of a group treated with silane and etching was significantly higher than that of a group treated with silane or etching with the application of Panavia 21 and Variolink(p<0.05). 3. A group treated with etching with the application of Variolink only showed a decrease of shear bond strength after thermocycling(p<0.05).

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