Publication: The potential of copper alloy as alternative material for post and core applications.
Accepted Date
2014-05-22
Issued Date
2014-09
Resource Type
Language
eng
ISSN
0125-5614 (printed)
Rights
Mahidol University
Rights Holder(s)
Faculty of Dentistry, Mahidol University.
Bibliographic Citation
Urapepon S, Peungpaiboon U. The potential of copper alloy as alternative material for post and core applications. M Dent J. 2014; 34(3): 225-33.
Suggested Citation
Somchai Urapepon, สมชาย อุรพีพล, Usanee Peungpaiboon, อุษณีย์ ปึงไพบูลย์ The potential of copper alloy as alternative material for post and core applications.. Urapepon S, Peungpaiboon U. The potential of copper alloy as alternative material for post and core applications. M Dent J. 2014; 34(3): 225-33.. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/1132
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Title
The potential of copper alloy as alternative material for post and core applications.
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Abstract
Objective: The purpose of this study was to investigate the use of copper
alloy for dental application.
Materials and methods: Three types of copper alloy used in Thailand were
selected (Cu-Al, Cu-Al-Ni and Cu-Zn). Ingots of these three alloys were
prepared. The tensile test and potentiodynamic polarization for corrosion test
were performed following ISO 1562: 2004 Dentistry-Casting gold alloys and ISO
10271: 2001 Dental metallic materials-Corrosion test method. The ultimate
strength, 0.2% proof stress, percentage of elongation after fracture and
modulus of elasticity were calculated from tensile stress-strain curves. Six
specimens for each test were made from each alloy.
Results: The percentage of elongation of Cu-Al, Cu-Al-Ni and Cu-Zn alloys
were not significantly different (48.6, 52.1, and 53.3 percent, respectively). The
proof stress of Cu-Al and Cu-Al-Ni alloys (88.5 and 72.1 MPa, respectively)
were not significantly different, while that of Cu-Zn alloy (38.9 MPa) was the
lowest. The ultimate tensile strength of Cu-Al alloy was significantly the
highest (321.9 MPa), while that of Cu-Al-Ni and Cu-Zn alloys (207.1 and 215.9
MPa, respectively) were not significantly different. The modulus of elasticity of
Cu-Al alloy was significantly the highest (122.9 GPa), while that of Cu-Al-Ni and
Cu-Zn alloys (97.9, and 102.3 GPa) were not significantly different. The
potentiodynamic curve of Cu-Zn alloy had no passive region, while the curve
of Cu-Al alloy had a shorter passive region than that of the Cu-Al-Ni alloy.
Conclusion: Regarding mechanical properties, Cu-Al alloy seemed the most
suitable for post and core materials while Cu-Al-Ni alloy had the highest
corrosion resistance. Thus, both Cu-Al and Cu-Al-Ni alloys showed promising
properties for further development as appropriate post-and-core materials.