摘要
Titanium (Ti) and its alloys are currently used as biomaterials for dental implants. However, titanium and its alloys suffer electrochemical corrosion in the oral environment. Ultrananocrystalline diamond (UNCD) coating is a promising coating material with exceptional biocompatibility, excellent osseointegration, high wear resistance and extreme resistance to chemical attack for producing a new generation of long-life dental implants. The main objective of this work was to investigate the basic electrochemical behavior of UNCD-coated samples of commercially pure titanium (Cp-Ti/Ti-2) and titanium alloy (Ti-6Al-4V/Ti-5) at three different pH conditions of artificial saliva. All titanium and titanium alloy samples of four groups were used: (a) control Ti-2, (b) UNCD-coated Ti-2, (c) control Ti- 5 and (d) UNCD-coated Ti-5. For each group, electrochemical analysis was performed at pH 3, 6.5 and 9.0. In the electrochemical tests, the evolution of potential was higher in the UNCD-coated Ti-2 and UNCD-coated Ti-5 than in the uncoated samples. Potentiodynamic (E-corr, I-corr) and impedance measurements also showed improvement in the electrochemical behavior of both UNCD-coated titanium samples for all three pH conditions. These preliminary findings indicate that UNCD coatings could be considered for the next generation the dental implants, to improve their performance.
- 出版日期2017-6