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. 2017 Jul-Sep;17(3):261-266.
doi: 10.4103/jips.jips_337_16.

Evaluation and comparison of shear bond strength of porcelain to a beryllium-free alloy of nickel-chromium, nickel and beryllium free alloy of cobalt-chromium, and titanium: An in vitro study

Ananya Singh  1 , Keerthi Ramachandra  1 , Achut R Devarhubli  1
Affiliations

Evaluation and comparison of shear bond strength of porcelain to a beryllium-free alloy of nickel-chromium, nickel and beryllium free alloy of cobalt-chromium, and titanium: An in vitro study

Ananya Singh et al. J Indian Prosthodont Soc. 2017 Jul-Sep.

Abstract

Aims: The aim of this study was to evaluate and compare the shear bond strength of porcelain to the alloys of nickel-chromium (Ni-Cr), cobalt-chromium (Co-Cr), and titanium.

Materials and methods: A total of 40 samples (25 mm × 3 mm × 0.5 mm) were fabricated using smooth casting wax and cast using Ni-Cr, Co-Cr, and titanium alloys followed by porcelain buildup. The samples were divided into four groups with each group containing 10 samples (Group A1-10: sandblasted Ni-Cr alloy, Group B1-10: sandblasted Co-Cr alloy, Group C1-10: nonsandblasted titanium alloy, and Group D1-10: sandblasted titanium alloy). Shear bond strength was measured using a Universal Testing Machine.

Statistical analysis used: ANOVA test and Tukey's honestly significance difference post hoc test for multiple comparisons.

Results: The mean shear bond strength values for these groups were 22.8960, 27.4400, 13.2560, and 25.3440 MPa, respectively, with sandblasted Co-Cr alloy having the highest and nonsandblasted titanium alloy having the lowest value.

Conclusion: It could be concluded that newer nickel and beryllium free Co-Cr alloys and titanium alloys with improved strength to weight ratio could prove to be good alternatives to the conventional nickel-based alloys when biocompatibility was a concern.

Keywords: Base metal alloys; cobalt-chromium; nickel-chromium; porcelain; shear bond strength; titanium.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Wax pattern for casting
Figure 2
Figure 2
Finished and polished specimens
Figure 3
Figure 3
Crosschecking length of casting using digital vernier Caliper
Figure 4
Figure 4
Crosschecking width of casting using digital vernier Caliper
Figure 5
Figure 5
Line diagram showing porcelain buildup on metal specimens
Figure 6
Figure 6
Porcelain buildup on castings
Figure 7
Figure 7
Testing for shear bond strength
Graph 1
Graph 1
Comparison of mean shear bond strength values of all four groups
See this image and copyright information in PMC

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