Ceramometal Bond Strength Analysis using New and Recast Nonprecious Alloys with Three Different Ceramics
Sulekha Gosavi, Arti Wadkar, Siddharth Y Gosavi
Citation Information :
Gosavi S, Wadkar A, Gosavi SY. Ceramometal Bond Strength Analysis using New and Recast Nonprecious Alloys with Three Different Ceramics. Int J Prosthodont Restor Dent 2013; 3 (1):14-20.
This study is undertaken to evaluate the dependence of bond strength of 100% fresh nonprecious alloy and the combination of 50% recast (used) alloy and 50% fresh alloy with three different veneering ceramic material.
Materials and methods
To evaluate the shear bond strength between new and recast alloy nonprecious Ni-Cr alloy (System KN®, Adentatec, Germany) was used with three different commercially available ceramics. A total of 60 samples were prepared and divided in two groups depending on the new or recast alloy. The 30 specimens of new alloy (group A) and 30 specimens of recast alloy (group B) were fabricated. Each group was again divided into three subgroups of 10 specimens for ceramic veneering Vita VMK-95 [V], IPS Classic [I] and Noritake [N] as veneering ceramic materials. Thus, six subgroups were formed as groups AV, AI, AN, BV, BI and BN. Groups AV and BV were veneered with Vita Ceramics, Groups AI and BI were veneered with IPS Classic (Ivoclar) and Groups AN and BN were veneered with Noritake. Then, shear bond strength between new and recast alloy was analyzed for each type of ceramics using MTS machine.
Results
The bond strength between new [group A] and recast alloy [group B] using three different veneering ceramics were evaluated. It was found that the new or the fresh alloy had highest shear bond strength than the recast alloy. Statistically, it was found that there was significant difference in bond strength between the new and recast alloys, when same type of ceramics was compared. When comparing ceramics, the Noritake group had highest bond strength, while other groups, that is, Vita and Ivoclar had comparatively low bond strength.
Conclusion
From this study, conclusion can be drawn that the use of 50% recast alloy shows reduction in bond strength values. Therefore, the use of recast alloy should not exceed more than 50%, as it would compromise the properties of alloy and the efficacy of bond strength between ceramic and alloy.
How to cite this article
Gosavi S, Wadkar A, Gosavi SY. Ceramometal Bond Strength Analysis using New and Recast Nonprecious Alloys with Three Different Ceramics. Int J Prosthodont Restor Dent 2013;3(1):14-20.
Restorative dental materials. 7th ed. St Louis: The CV Mosby Co.; 1985. p. 432-449.
Scinner's science of dental materials. Philadelphia: WB Saunders Co./Hartcourt Brace and Company International; 1992. Chapter 20; p. 372.
Compositional stability and marginal accuracy of complete cast crowns made with as-received and recast type III gold alloy. J Prosthet Dent 2002 Feb;87(2):162-166.
Castability, opaque masking, and porcelain bonding of 17 porcelain-fusedto- metal alloys. J Prosthet Dent 1996 Apr;75(4):367-374.
Metal ceramic compatibility: a review of literature. J Prosthet Dent 1990 Jan;63(1):21-25.
ANSI/ADA Specification No. 38-2000. Metal-ceramic systems: 2000. Chicago: American Dental Association; 2000 (Reaffirmed 2010). Available from: http://webstore.ada.org .
Determination of apparent bond strength of alloy porcelain systems. J Dent Res 1974; 53:240.
Interactive effects of etching and pre-oxidation on porcelain adherence on the non-precious alloys: a guided planer shear test study. Dent Mat 1990 Oct;6(4):217-222.
A simple shear test to evaluate the bond of ceramic fused to metal. Aust Dent J 1980 Dec;25(6):357-361.
Physical properties of a repeatedly used nonprecious metal alloy. J Prosthet Dent 1980 Sep;44(3):291-295.
Effect of remelt and recasting on physical properties and structure of non-precious alloy. Br Dent. J 1965;118:23-33.
Bond strength and mechanical properties of dental porcelain enamels. J Prosthet Dent 1967 Aug;18(2):155-159.
The effect of recasting on the oxidation layer of a palladium-silver porcelain alloy. J Prosthet Dent 1988 Apr;59(4):420-425.
Recasting a nickel-chromimum alloy. J Prosthet Dent 1986 Jan;55(1):122-127.
Multiple recast of a nickel-chromium-beryllium alloy. J Prosthet Dent 1983 Aug;50(2):198-199.
Effect of recasting of Nickel- Chromium alloy on its hardness. Int J Dent Clin 2010:2(4):8-11.
Effects of varying surface texture on bond strength of one semiprecious and one nonprecious ceramo-metal alloy. J Prosthet Dent 1979 Jul;42(1):86-95.
The effect of using recast metal on the bond between porcelain and a gold-palladium alloy. J Prosthet Dent 1986 Apr;55(4):447-453.
Reuse of silver-palladium ceramic metal. J Prosthet Dent 1991 Apr;65(4):588-591.
Mechanical property and microstructural variations for recast low-gold alloy. Int J Prosthodont 1995 Jul-Aug;8(4):346-350.
The effect of recasting on bond strength between porcelain and base-metal alloys. J Prosthodont 2011 Apr;20(3):190-194.
The effect of metal recasting on porcelain-metal bonding: a force-to-failure study. J Prosthet Dent 2010 Sep;104(3):165-172.
The science and art of dental sciences ceramics. The nature of dental ceramics and their clinical use. Chicago; Quintessence publication co 1979;1.