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KMID : 0362420100480010001
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Journal of Korean Academy of Prosthodontics
2010 Volume.48 No. 1 p.1 ~ p.7
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Marginal fidelity of zirconia core using MAD/MAM system
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Kang Dong-Rim
Lee Keun-Woo
Shim June-Sung
Moon Hong-Seok
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Abstract
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Purpose: The purpose of this study was to evaluate the fit of zirconia core using MAD/MAM system comparing to that of conventional metal-ceramic and CAD/CAM system.
Materials and Methods : Duplicating the prepared resin tooth, 50 improved stone dies were fabricated. These dies are classified as a group of 5 to create the core. The groups were composed of metal-ceramic, Cercon®, Ceramill®, Rainbow™, and Zirkonzhan®. Each core was cemented to stone die, and then, absolute marginal discrepancy was measured with microscope at a magnification of ×50. Statistical analysis was done with one-way ANOVA test and Tukey’s HSD test.
Results: The mean absolute marginal discrepancy for metal-ceramic was 51.97 ± 23.38 μm, for Cercon® was 62.16 ± 25.88 μm, for Ceramill® was 67.64 ± 40.38 μm, for Rainbow™ was 125.07 ± 42.19 μm, and for Zirkonzhan® was 105 ± 44.61 μm.
Conclusions: 1. Fit of margin was identified as in the order of metal-ceramic, Cercon®, Ceramill®, Zirkonzhan®, and Rainbow™. 2. Absolute marginal discrepancy of the zirconia core that designed by MAD/MAM system had significant differences in order of Ceramill®, Zirkonzhan®, and Rainbow™. 3. The mean absolute marginal discrepancy between Cercon® and Ceramill® did not show significant differences.
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KEYWORD
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Zirconia, core, MAD/MAM, Marginal discrepancy
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