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http://dx.doi.org/10.4047/jkap.2010.48.4.273

Comparative study in marginal fit of a pressed ceramic and feldspathic porcelain fused to metal restoration  

Kim, Yoon-Young (Dentistry, Department of Medical Science, Hanyang University Graduate School)
Park, Won-Hee (Dentistry, Department of Medical Science, Hanyang University Graduate School)
Yoo, Dong-Yeob (Dentistry, Department of Medical Science, Hanyang University Graduate School)
Lee, Young-Soo (Dentistry, Department of Medical Science, Hanyang University Graduate School)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.48, no.4, 2010 , pp. 273-279 More about this Journal
Abstract
Purpose: The purpose of this in vitro study was to compare the marginal adaptation of a ceramic-pressed-to-metal restoration with traditional metal-ceramic restoration. Materials and methods: Duplicating the prepared resin tooth, 20 metal dies were fabricated. Twenty metal copings of 2 groups which were metal ceramic restoration and pressed to metal restoration were fabricated. The marginal opening of each coping was measured with Microscope (BX 60M-36E $41D^{(R)}$: Olympus, Japan). After porcelain build-up, the marginal opening of metal ceramic restoration and pressed to metal restoration ($PoM^{(R)}$: Ivoclar vivadent., Liechtenstein) were also evaluated in the same method. The measurements were analyzed using Wilcoxon Signed Ranks test and Mann-Whitney U test. Results: Within the limits of this study, the results were as follows. 1. Metal-ceramic restorations in coping state ($64.93{\pm}12.48\;{\mu}m$) in compared with Metal ceramic restorations after porcelain build-up ($63.43{\pm}12.86\;{\mu}m$) had no significant difference in marginal adaptation. 2. Pressed-metal-ceramic restorations in coping state ($50.00{\pm}12.28\;{\mu}m$) in compared with Pressed metal ceramic restorations after porcelain build-up ($56.72{\pm}13.80\;{\mu}m$) had no significant difference in marginal adaptation. 3. Metal-ceramic restorations in compared Pressed-metal-ceramic restorations had no significant difference in marginal adaptation. Conclusion: Pressed-metal-ceramic restorations have the advantage of being technically less change through using of the lost-wax technique and this allows for the convenience of a full-contour ceramic wax-up as opposed to the more technique-sensitive layering method. Pressed-metal-ceramic restorations may be considered in clinic on the basis of the result of this study and the advantage of this system.
Keywords
Ceramic-pressed to metal restoration; Marginal adaptation;
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Times Cited By KSCI : 5  (Citation Analysis)
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