J Korean Acad Prosthodont.  2019 Apr;57(2):95-101. 10.4047/jkap.2019.57.2.95.

Effects of primers on the microtensile bond strength of resin cements to cobalt-chromium alloy

• Jung HT
• Campana SA
• Park JH
• Shin JH
• Lee JY

• KMID: 2444177
• DOI: http://doi.org/10.4047/jkap.2019.57.2.95

Abstract

PURPOSE
The aim of this study is to evaluate the effects of various primers on the microtensile bond strength (µTBS) of resin cements to cobalt-chromium (Co-Cr) dental casting alloy.
MATERIALS AND METHODS
Four adhesive primers (Universal primer, Metal primer II, Alloy primer, and Metal/Zirconia primer) and two resin cements (Panavia F2.0, G-CEM LinkAce) were tested. One hundred fifty Co-Cr beams were prepared from Co-Cr ingots via casting (6 mm length × 1 mm width × 1 mm thick). The metal beams were randomly divided into ten groups according to the adhesive primers and resin cements used; the no-primer groups served as the control (n = 15). After sandblasting with aluminum oxide (125 µm grain), the metal and resin cements were bonded together using a silicone mold. Prior to testing, all metal-resin beams were examined under stereomicroscope, and subjected to the µTBS test. The mean value of each group was analyzed via one-way ANOVA with Tukey's test as post hoc (α = .05) using SPSS software.
RESULTS
The mean µTBS of all groups was ranged from 20 to 28 MPa. There is no statistically significant difference between groups (P > .05). Mixed failure, which is the combination of adhesive and cohesive failures, is the most prevalent failure mode in both the Panavia F2.0 and G-Cem LinkAce groups.
CONCLUSION
The µTBS of all tested groups are relatively high; however, the primers used in this study result in no favorable effect in the µTBS of Panavia F2.0 and G-Cem LinkAce resin cement to Co-Cr alloy.

Keyword

Bond strength; Metal alloy; Resin cement; Primer

MeSH Terms

Adhesives
Alloys*
Aluminum Oxide
Fungi
Resin Cements*
Silicon
Silicones
Adhesives
Alloys
Aluminum Oxide
Resin Cements
Silicon
Silicones

Figure

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  Fig. 1 Fabrication of specimen. (A) A silicone mold, (B) The metal-resin specimen.

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  Fig. 2 (A) Metal-resin beams were individually attached via an active gripping method to the flat grips steel fixture of the microtensile tester using LI-BOND PEN adhesive. (B) The metal-resin specimens were loaded under tension (crosshead speed: 1.0 mm/min).

• 

  Fig. 3 Mean and standard deviation of µTBS results. (GC: G-CEM LinkAce, PAN: Panavia F2.0, NP: no primer, UP: universal primer, MP: metal primer, AP: Alloy primer, MZP: metal/zirconia primer).

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  Fig. 4 The percentage of mode of failure in the Panavia F2.0 group (A) and G-Cem group (B). (GC: G-CEM LinkAce, PAN: Panavia F2.0, NP: no primer, UP: universal primer, MP: metal primer, AP: Alloy primer, MZP: metal/zirconia primer).

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