摘要
目的观察含氟人工唾液对选择性激光熔积技术(SLM)制作的钴铬合金耐腐蚀性的影响。方法将具有相同成分的钴铬合金粉末和金属块,分别运用SLM技术(SLM组)和铸造工艺(对照组)制作试件,每组40个。分别在pH为5.0和2.5以及模拟口腔含氟0、0.05%、0.10%和0.20%的条件下,将试件置于Fusayam人工唾液中浸泡24 h。采用极化曲线Tafel外延法求得两组试样的极化阻力Rp值,比较两组试件的耐腐蚀性。结果 pH值为5.0时,在含氟0和0.05%的条件下,两组间Rp值比较差异无统计学意义(P>0.05);而在含氟0.1%和0.2%的条件下,SLM组的Rp值显著大于对照组(P<0.05)。当pH为2.5时,在含氟0、0.05%、0.10%和0.20%的条件下,SLM组的Rp值均显著大于对照组(P<0.05)。结论氟化物能影响钴铬合金的耐腐蚀性能,SLM钴铬合金的耐腐蚀性优于铸造钴铬合金。
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 fluoride-containing 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.
出处
《上海交通大学学报（医学版）》
CAS
CSCD
北大核心
2014年第3期314-317,328,共5页
Journal of Shanghai Jiao tong University:Medical Science
基金
上海市科委资助项目(12441903001
13140902701)~~
关键词
选择性激光熔积技术
钴铬合金
氟化物
耐腐蚀性
selective laser melting
Cobalt-chromium alloy
fluoride
anti-corrosion behavior
