Effects of different fluorine-containing oral artificial saliva solution on anti-corrosion behavior of selective laser melting cobalt-chromium alloy
Online published: 2014-04-02
Supported by
Foundation of Science and Technology Commission of Shanghai Municipality, 12441903001, 13140902701
Objective To evaluate the effects of different fluoride-containing artificial saliva solution on the corrosion of the dental cobalt-chromium (Co-Cr) alloy fabricated by selective laser melting (SLM). Methods The study involved two groups, each group has 40 cylinder specimens and all specimens were fabricated by the same Co-Cr alloy. One group adopted SLM, while the other group used the cast method. Under conditions of two different pHs (2.5 and 5.0) and four different fluoridecontaining artificial saliva solution concentration (0, 0.05%, 0.1%, and 0.2%), polarization curve tests were performed to compare the anti-corrosion ability of two groups. Results For pH of 5.0 (fluoride-containing artificial saliva solution concentrations were 0 and 0.05%), differences of Rp values between two groups were not statistically significant (P>0.05). For pH of 5.0 (fluoride-containing artificial saliva solution concentration were 0.1% and 0.2%) and pH of 2.5 (fluoride-containing artificial saliva solution concentration were 0, 0.05%, 0.1%, and 0.2%), the Rp value of SLM specimens were significantly higher than those of the cast ones (P<0.05). Conclusion Fluorine can affect the anti-corrosion ability of Co-Cr alloy. SLM specimens exhibited a significantly better anti-corrosion ability than cast ones.
ZENG Li , ZHANG Yong , YANG Xu , et al . Effects of different fluorine-containing oral artificial saliva solution on anti-corrosion behavior of selective laser melting cobalt-chromium alloy[J]. Journal of Shanghai Jiao Tong University (Medical Science), 2014 , 34(3) : 314 . DOI: 10.3969/j.issn.1674-8115.2014.03.011
/
〈 |
|
〉 |