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KMID : 0362120070290020213
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Journal of Technologic Dentistry
2007 Volume.29 No. 2 p.213 ~ p.223
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The effect of the gold based bonding agents on the bond between Ni-Cr alloys and ceramic restorations
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Lee Jung-Hwan
Joo Kyu-Ji
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Abstract
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The success of a porcelain fused to metal (PFM) restoration depends upon the quality of the porcelain-metal bond. The adhesion between metal substructure and dental porcelain is related to the diffusion of oxygen to the reaction layer formed on cast-metal surface during firing.
The purposed of this investigation was to study the effects of gold based bonding agent on Ni-Cr alloy-ceramic adhesion between porcelain matrix, gold based bonding agent and metal substructure interface. gold based bonding agent have been applied as an intermediate layer between a metal substructure and a ceramic coating. gold based bonding agent(Aurofilm NP, Metalor, Swiss) was applied on Ni-Cr alloy surface by four method. Surfaces only air abraded with 110ß≠ Al2O3 particles were used as control. metal ceramic adhesion was evaluated by a biaxial flexure test(N=5) and volume fraction of adherent porcelain was determined by SEM/EDS analysis. Result of this study suggest that the layering sequence of gold based bonding agent is very important and can improve porcelain adherence to PFM.
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KEYWORD
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Gold based bonding agent, PFM, porcelain
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