earticle

영어

In dental prosthetics, the application of metal-ceramic restorations has steadily increased since theirintroduction. This is due to excellent esthetics in combination with high mechanical stability. In order to optimumbond strength between metal and ceramics, controlled oxidation of metal substructure is essential factor. Beryllium containing and beryllium free Ni-Cr alloys for metal-ceramic restorations were evaluated forthe metal-ceramic bond strength by changing heat treatment for oxide formation. A mechanical three-pointbending test was employed to evaluate the interfacial bond strength of metal-ceramic. In each metal, platetype specimens were used for mechanical three-point bending test .With Ni-Cr alloys for metal ceramics, mechanical three-point bending test showed that double degassingwas more available preheat treament method than another. It was found that beryllium containing Ni-Cralloys are more effective than beryllium-free for metal-ceramic bond strength.