上海交通大学学报（医学版）

上海交通大学学报（医学版）

• 论著（基础研究） • 上一篇    下一篇

含氟人工唾液对选择性激光熔积钴铬合金耐腐蚀性的影响

曾 丽1，张 勇2，杨 旭1，忻贤贞1，魏 斌1   

  1. 1.上海交通大学 医学院附属第九人民医院口腔特需门诊 上海市口腔医学重点实验室, 上海 200011； 2.上海复星医疗系统有限公司，复星&贝格数字化加工中心， 上海 200011
  • 出版日期:2014-03-28 发布日期:2014-04-02
  • 通讯作者: 魏 斌, 电子信箱: weibin0328@hotmail.com。
  • 作者简介:曾 丽（1988—）， 女， 学士; 电子信箱: zenglibaobao@163.com。
  • 基金资助:

    上海市科委资助项目（12441903001, 13140902701）

Effects of different fluorine-containing oral artificial saliva solution on anti-corrosion behavior of selective laser melting cobalt-chromium alloy

ZENG Li1, ZHANG Yong2, YANG Xu1, XIN Xian-zhen1, WEI Bin1   

  1. 1.Department of Stomatology Special Consultation Clininc, the Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China； 2.Shanghai Foshion & BEGO CAD/CAM Center， Shanghai Foshion Dental Division， Shanghai 200011, China
  • Online:2014-03-28 Published:2014-04-02
  • Supported by:

    Foundation of Science and Technology Commission of Shanghai Municipality, 12441903001, 13140902701

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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。

关键词: 选择性激光熔积技术, 钴铬合金, 氟化物, 耐腐蚀性

Abstract:

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.

Key words: selective laser melting, Cobalt-chromium alloy, fluoride, anti-corrosion behavior