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KMID : 0362120020240010033
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Journal of Technologic Dentistry
2002 Volume.24 No. 1 p.33 ~ p.41
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The effect of preheat treatment on ceramic to metal bond strength
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Kim Chi-Young
Kim Young-Kon
Cho Hyeon-Seol
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Abstract
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In dental prosthetics, the application of metal-ceramic restorations has steadily increased since their introduction. This is due to excellent esthetics in combination with high mechanical stability. In order to optimum bond 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 for the metal-ceramic bond strength by changing heat treatment for oxide formation. A mechanical three-point bending test was employed to evaluate the interfacial bond strength of metal-ceramic. In each metal, plate type specimens were used for mechanical three-point bending test. With Ni-Cr alloys for metal ceramics, mechanical three-point bending test showed that double degassing was more available preheat treatment method than another. It was found that beryllium containing Ni-Cr alloys are more effective than beryllium-free for metal-ceramic bond strength.
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KEYWORD
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Ni-Cr alloy for metal-ceramic restorations, preheat treatment, bond strength
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