The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Shear bond strength of the three different kinds of resin cement on CAD/CAM ceramic inlay

CAD/CAM 세라믹 인레이에 대한 3종의 레진 시멘트의 전단결합강도에 관한 연구

  • Baek, Chul-Woo (Department of Esthetic Restorative Dentistry, Graduate School of Clinical Dentistry, Korea University) ;
  • Park, Cheol-Woo (Department of Esthetic Restorative Dentistry, Graduate School of Clinical Dentistry, Korea University) ;
  • Park, Jun-Sub (Goodwill Dental Hospital) ;
  • Ryu, Jae-Jun (Department of Esthetic Restorative Dentistry, Graduate School of Clinical Dentistry, Korea University)
  • 백철우 (고려대학교 임상치의학대학원 심미수복학과) ;
  • 박철우 (고려대학교 임상치의학대학원 심미수복학과) ;
  • 박준섭 (굿윌치과병원) ;
  • 류재준 (고려대학교 임상치의학대학원 심미수복학과)
  • Received : 2012.10.10
  • Accepted : 2013.01.05
  • Published : 2013.01.31
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Abstract

Purpose: The purpose of this study was to evaluate the bond strengths between the latest CAD/CAM ceramic inlay and various resin cements which are used primarily for esthetic restoration. Materials and methods: Cylindrical ceramic blocks(Height: 5 mm, diameter: 3 mm) were fabricated by using Cerec3 and bonded on the dentin of the ninety extracted caries-free molars using three different kinds of resin cement(Unicem$^{(R)}$, Biscem$^{(R)}$, and Variolink II$^{(R)}$) according to the manufacturer's instructions. Ninety specimens were divided into 3 groups according to three different kinds of resin cement. Half of each group were conducted thermocycling under the conditions of the $5-55^{\circ}C$, 5,000 cycle but the other half of them weren't. All specimens were kept in normal saline $37^{\circ}C$, for 24 hours before measuring the bond strength. The shear bond strength was measured by Universal testing machine with a cross head speed of 0.5 mm/min. The results were analyzed statistically by t-test and one-way ANOVA. Results: Unicem$^{(R)}$ group showed the highest shear bond strength despite a slight decline by thermocycling. The shear bond strength of Unicem$^{(R)}$ group and ValiolinkII$^{(R)}$ group were significantly influenced by thermocycling, whereas Biscem$^{(R)}$ group was not influenced (P<.05). There were no significant differences in the bond strength between the three groups without thermocycling, but there was significant differences between Unicem$^{(R)}$ group and Valiolink II$^{(R)}$ group with thermocycling(P<.05). Conclusion: It has been shown to be clinically effective when the self-adhesive resin cements Unicem$^{(R)}$ and Biscem$^{(R)}$ were used instead of the etch-and-rinse resin cement Valiolink II$^{(R)}$ during the bonding of CAD/CAM ceramic inlay restorations with teeth.

연구 목적: 본 연구는 최근 심미수복에 주로 사용되는 CAD/CAM 세라믹 인레이와 각종 레진 시멘트간의 결합강도를 알아보고자 하였다. 연구 재료 및 방법: 원기둥 모양의 세라믹 블록(높이: 5 mm, 직경: 3 mm)을 Cerec3로 제작하고, 총 90개의 우식이 없는 대구치의 상아질 표면에 세 종류의 레진 시멘트(Unicem$^{(R)}$, Biscem$^{(R)}$, Variolink II$^{(R)}$)를 사용하여 각각 제조업체의 지시에 따라 접착했다. 90개의 시편을 레진 시멘트의 종류에 따라 3개의 군으로 나누고, 각 군의 절반은 $5-55^{\circ}C$, 5,000 cycle 조건 하에서 thermocycling을 시행하였고, 다른 절반은 시행하지 않았다. 모든 시편은 결합강도를 측정하기 전에 $37^{\circ}C$ 생리 식염수에 24시간 동안 보관되었다. 전단결합강도는 만능시험기를 이용하여 0.5 mm/min의 cross head speed로 측정하였다. 결과 값은 t-test 및 one-way ANOVA를 사용하여 통계 분석하였다. 결과: Unicem$^{(R)}$ 군의 전단결합강도가 thermocycling 후에 약간 감소했으나 3 개의 군 중 가장 높은 결합 강도를 보였다. Unicem$^{(R)}$ 및 Valiolink II$^{(R)}$ 군의 전단결합강도가 thermocycling에 영향을 받았지만 Biscem$^{(R)}$은 영향을 받지 않았다(P<.05). Thermocyling 전에는 3개의 군 간의 결합강도에 유의한 차이가 없었지만, thermocyling 후에는 Unicem$^{(R)}$과 Valiolink II$^{(R)}$ 군 간에 유의한 차이가 있었다(P<.05). 결론:CAD/CAM 세라믹 인레이 수복물을 치아에 접착할 때, etch-and-rinse 레진 시멘트인 Valiolink II$^{(R)}$ 대신self-adhesive 레진 시멘트인 Unicem$^{(R)}$과 Biscem$^{(R)}$을 사용해도 임상적으로 유용하다.

Keywords

References

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