Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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The Surface Property and Shear Bonding Strength according to Composition of Ni-Cr alloy for Porcelain Fused to Metal Crown

도재용착주조관용 Ni-Cr계 합금의 조성에 따른 표면특성 및 전단결합강도 관찰

  • 김갑진 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 정인성 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 최성민 (부산가톨릭대학교 보건과학대학 치기공학과)
  • Received : 2013.04.25
  • Accepted : 2013.06.26
  • Published : 2013.07.01
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Abstract

Purpose: This study was to observe surface property and bonding strength according to composition of Ni-Cr alloy for porcelain fused to metal crown. The two kinds of Ni-Cr alloy with different composition ratio of parent metal were observed general properties and chemical properties of each alloy surface and measured the shear bonding strength between ceramic and each alloys. The aim of study was to suggest the material for design of parent metal's composition ratio to development of alloy for porcelain fused to metal crown. Methods: The two kinds of alloy as test specimen was Ni(71wt.%)-Cr(12wt.%) and Ni(63wt.%)-Cr(23wt.%) alloy. The oxide on surface was observed by SEM and EDX. And the shear test was performed by MTS. Results: The surface property and oxide characteristic analysis of oxide layer, weight percentage of Element O within $Ni_{71}Cr_{12}$ alloy measured 12.74wt.%, but $Ni_{63}Cr_{23}$ alloy was measured 15.91wt.%. And the maximum shear bonding strength was measured 106.14MPa between $Ni_{71}Cr_{12}$ alloy and vintage halo (VV group). Conclusion: The surface property and oxide characteristic of $Ni_{71}Cr_{12}$ alloy was similar to $Ni_{63}Cr_{23}$ alloy. And VV group has the strongest shear bonding strength.

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References

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