J Adv Prosthodont.  2014 Oct;6(5):372-378. 10.4047/jap.2014.6.5.372.

A comparative study on the bond strength of porcelain to the millingable Pd-Ag alloy

Affiliations
  • 1Department of Prosthodontics, College of Dentistry, Dankook University, Cheonan, Republic of Korea. syshin@dankook.ac.kr

Abstract

PURPOSE
The porcelain fused to gold has been widely used as a restoration both with the natural esthetics of the porcelain and durability and marginal fit of metal casting. However, recently, due to the continuous rise in the price of gold, an interest towards materials to replace gold alloy is getting higher. This study compared the bond strength of porcelain to millingable palladium-silver (Pd-Ag) alloy, with that of 3 conventionally used metal-ceramic alloys.
MATERIALS AND METHODS
Four types of metal-ceramic alloys, castable nonprecious nickel-chrome alloy, castable precious metal alloys containing 83% and 32% of gold, and millingable Pd-Ag alloy were used to make metal specimens (n=40). And porcelain was applied on the center area of metal specimen. Three-point bending test was performed with universal testing machine. The bond strength data were analyzed with a one-way ANOVA and post hoc Scheffe's tests (alpha=.05).
RESULTS
The 3-point bending test showed the strongest (40.42 +/- 5.72 MPa) metal-ceramic bond in the nonprecious Ni-Cr alloy, followed by millingable Pd-Ag alloy (37.71 +/- 2.46 MPa), precious metal alloy containing 83% of gold (35.89 +/- 1.93 MPa), and precious metal alloy containing 32% of gold (34.59 +/- 2.63 MPa). Nonprecious Ni-Cr alloy and precious metal alloy containing 32% of gold showed significant difference (P<.05).
CONCLUSION
The type of metal-ceramic alloys affects the bond strength of porcelain. Every metal-ceramic alloy used in this study showed clinically applicable bond strength with porcelain (25 MPa).

Keyword

Metal ceramic alloys; Palladium-silver alloy; Bending test; Porcelain bond strength

MeSH Terms

Alloys*
Dental Porcelain*
Esthetics
Metal Ceramic Alloys
Alloys
Dental Porcelain
Metal Ceramic Alloys

Figure

  • Fig. 1 Surface treated metal specimens.

  • Fig. 2 Schematic diagram of the testing condition (ISO 9693 standards).

  • Fig. 3 The mean and standard deviations of each groups.


Cited by  1 articles

Comparative clinical study of the marginal discrepancy of fixed dental prosthesis fabricated by the milling-sintering method using a presintered alloy
Mijoo Kim, Jaewon Kim, Hang-Nga Mai, Tae-Yub Kwon, Yong-Do Choi, Cheong-Hee Lee, Du-Hyeong Lee
J Adv Prosthodont. 2019;11(5):280-285.    doi: 10.4047/jap.2019.11.5.280.


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