J Korean Acad Prosthodont.  2010 Oct;48(4):273-279. 10.4047/jkap.2010.48.4.273.

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

• Kim YY
• Park WH
• Yoo DY
• Lee YS

• KMID: 2195544
• DOI: http://doi.org/10.4047/jkap.2010.48.4.273

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 +/- 12.48 microm) in compared with Metal ceramic restorations after porcelain build-up (63.43 +/- 12.86 microm) had no significant difference in marginal adaptation. 2. Pressed-metal-ceramic restorations in coping state (50.00 +/- 12.28 microm) in compared with Pressed metal ceramic restorations after porcelain build-up (56.72 +/- 13.80 microm) 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.

Keyword

Ceramic-pressed to metal restoration; Marginal adaptation

MeSH Terms

Acrylic Resins
Ceramics
Composite Resins
Dental Porcelain
Imidazoles
Metal Ceramic Alloys
Nitro Compounds
Polyurethanes
Tooth
Waxes
Acrylic Resins
Ceramics
Composite Resins
Dental Porcelain
Imidazoles
Metal Ceramic Alloys
Nitro Compounds
Polyurethanes
Waxes

Figure

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  Fig. 1. Metal dies.

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  Fig. 2. Working model in this study. A: lateral view, B: occlusal view.

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  Fig. 3. Microscope image. A: PFM coping, B: PoM® coping, C: PFM, D: PoM®.

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