Implantology.  2019 Sep;23(3):162-168. 10.32542/implantology.2019013.

Comparison of Mechanical Properties of Milled and Casted Cobalt-Chromium Alloys Using Three-point Bending Test

• Hong JK
• Kim SK
• Heo SJ
• Koak JY
• Ahn JS

• KMID: 2465787
• DOI: http://doi.org/10.32542/implantology.2019013

Abstract

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.

Keyword

CAD/CAM; Co-Cr alloy; Mechanical properties; Milling metal; Three-point bending test

MeSH Terms

Alloys
Chromium Alloys*
Methods
Alloys
Chromium Alloys