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KMID : 1157520120080010001
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International Journal of Clinical Preventive Dentistry
2012 Volume.8 No. 1 p.1 ~ p.6
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The Bond Strength of Ni-Cr Free Alloys of Recasting for Porcelain Fused to Metal
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Yoo Ji-Heui
Lee Myeung-Gu
Kim Young-Il
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Abstract
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Objective: This study was to find out the effect on bond strength to porcelain of reusing some Ni-Cr alloys that do not include Beryllium, as a harmful substance.
Methods: Alphaloy (Alpha Dent. KOREA), Vera Bond 2V (AlbaDent, Inc. USA), T4 (Ticonum. USA) as non precious alloys without Beryllium and Noritake Super Porcelain EX-3 porcelain powder were used as experimental materials. 3 point flexual rigidity test was done using universal tester (Houndsfield, England) to measure bond strength of metal to porcelain and the following results were gained.
Results: 1. In case of Alphaloy, significant discrepancy was shown with mean value being the highest in single use. And as a result of post-examination, it has been shown that there was difference between single use and 3 time reuse. 2. In case of Vera Bond 2V, the mean value was the highest in single use. But it was not a significant discrepancy. 3. In case of T4, there was significant discrepancy with the mean value being the highest in single use. The results of post-examination showed there was difference between single use, 3 time reuse and 5 time reuse.
Conclusion: Establishing strategies on how we will use Ni-Cr alloys from now on and advanced studies for more systematic future study results should be done.
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KEYWORD
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dental porcelain, metal ceramic alloys
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