Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (42): 7861-7864.doi: 10.3969/j.issn.1673-8225.2010.42.017

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Effect of gold-plated layer treatment on the surface properties of medical Ni-Cr alloy

Chen Guang, Yu Zhan-hai, Ma Xin, Zhang Xuan, Yin Li-hua, Zhang Ju-mei   

  1. School of Stomatology, Lanzhou University, Lanzhou   730000, Gansu Province, China
  • Online:2010-10-15 Published:2010-10-15
  • Contact: Yu Zhan-hai, Professor, School of Stomatology, Lanzhou University, Lanzhou 730000, Gansu Province, China
  • About author:Chen Guang★, Studying for master’s degree, School of Stomatology, Lanzhou University, Lanzhou 730000, Gansu Province, China sunny123819@126.com
  • Supported by:

    the Natural Science Foundation of Gansu Province, No. 3ZS061-A25-103*

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Abstract:

BACKGROUND: Nickel-chromium alloy exists for a long term in body fluid, which is a specific electrolyte environment, the precipitation of nickel ions is especially evident, leading to not only allergic reactions, but also certain teratogenic and carcinogenic effects. Surface modification on nickel-chromium alloy can theoretically improve the safety of nickel-chromium alloy.
OBJECTIVE: To determine the amount of Ni2+ released of medical nickel-chromium alloys, which was electroplated with non-cyanogen gold coating treatment.
METHODS: A total of 50 nickel-chromium alloy specimens were randomly divided into nickel-chromium alloy with non-cyanogen gold-plated group and nickel-chromium alloy group. The specimens were soaked in artificial saliva environment at pH 4.8 and pH 7.0 respectively, the nickel ion precipitation was detected using AA-240 atomic absorption spectronphotometer.
RESULTS AND CONCLUSION: The nickel ion precipitation from non-cyanogen gold-plated nickel-chromium alloy specimens was significant decreased compared with unplated specimens in artificial saliva environment at pH 4.8 and pH 7.0 (P < 0.05). The non-cyanogen gliding may reduce the nickel ion precipitation, the stability of medical nickel-chromium alloy surface is improved.

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