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KMID : 0602720190230030162
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Implantology
2019 Volume.23 No. 3 p.162 ~ p.168
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Comparison of Mechanical Properties of Milled and Casted Cobalt-Chromium Alloys Using Three-point Bending Tes
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Hong Joon-Ki
Kim Seong-Kyun
Heo Seong-Joo
Koak Jai-Young
Ahn Jin-Soo
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Abstract
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Purpose: The objective of this study was to investigate the mechanical properties of Cobalt- Chromium (Co-Cr) alloys made by conventional casting method and Computer-Aided Design/ Computer ?Aided Manufacturing (CAD-CAM) milling method.
Material and Methods: Co-Cr alloy specimens (n=8) were made by casting and milling methods.
The size of the specimens was 34 mm × 13 mm × 1.5 mm, according to ISO 22674: 2016. Three-point bending test was conducted by universal testing machine, stress and strain values were obtained.
Statistical significance was tested using the t-test.
Results: Flexural strength of the milled sample was significantly lower than of casted (p < 0.05).
Similarly, 0.2% yield strength of milled sample was also lower than of casted (p < 0.05).
Conclusion: Although there is a significant difference in mechanical properties of milled and casted Co-Cr alloy, they are both are clinically acceptable.
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KEYWORD
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CAD/CAM, Co-Cr alloy, Mechanical properties, Milling metal, Three-point bending test
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