J Adv Prosthodont.  2015 Oct;7(5):392-399. 10.4047/jap.2015.7.5.392.

Effect of metal primers and tarnish treatment on bonding between dental alloys and veneer resin

• Choo SS
• Huh YH
• Cho LR
• Park CJ

• KMID: 2083883
• DOI: http://doi.org/10.4047/jap.2015.7.5.392

Abstract

PURPOSE
The aim of this study was to evaluate the effect of metal primers on the bonding of dental alloys and veneer resin. Polyvinylpyrrolidone solution's tarnish effect on bonding strength was also investigated.
MATERIALS AND METHODS
Disk-shape metal specimens (diameter 8 mm, thickness 1.5 mm) were made from 3 kinds of alloy (Co-Cr, Ti and Au-Ag-Pd alloy) and divided into 4 groups per each alloy. Half specimens (n=12 per group) in tarnished group were immersed into polyvinylpyrrolidone solution for 24 hours. In Co-Cr and Ti-alloy, Alloy Primer (MDP + VBATDT) and MAC-Bond II (MAC-10) were applied, while Alloy Primer and V-Primer (VBATDT) were applied to Au-Ag-Pd alloys. After surface treatment, veneering composite resin were applied and shear bond strength test were conducted.
RESULTS
Alloy Primer showed higher shear bond strength than MAC-Bond II in Co-Cr alloys and Au-Ag-Pd alloy (P<.05). However, in Ti alloy, there was no significant difference between Alloy Primer and MAC-Bond II. Tarnished Co-Cr and Au-Ag-Pd alloy surfaces presented significantly decreased shear bond strength.
CONCLUSION
Combined use of MDP and VBATDT were effective in bonding of the resin to Co-Cr and Au-Ag-Pd alloy. Tarnish using polyvinylpyrrolidone solution negatively affected on the bonding of veneer resin to Co-Cr and Au-Ag-Pd alloys.

Keyword

Metal primer; Resin; Polyvinylpyrrolidone solution; Shear bond strength; Tarnish

MeSH Terms

Alloys
Dental Alloys*
Povidone
Alloys
Dental Alloys
Povidone

Figure

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  Fig. 1 Experimental protocols.

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  Fig. 2 Mean shear bond strength values. Untarnish vs. Tarnish.

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  Fig. 3 Airborne-particle abraded specimen with Al2O3 (SEM photograph, ×4,000 magnification). (A) Co-Cr alloy, (B) Ti alloy, (C) Au-Ag-Pd alloy.

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  Fig. 4 Tarnished specimen by polyvinylpyrrolidone solution (SEM photograph, ×4,000 magnification). (A) Co-Cr alloy, (B) Ti alloy, (C) Au-Ag-Pd alloy.

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  Fig. 5 Representative SEM photograph for failure mode. (A) cohesive failure, (B) mixed failure, (C) adhesive failure.

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