中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 19 No. 4 August 2009 |
Yong-Hoon JEONG2, Han-Cheol CHOE2
（1. Department of Prosthodontics, College of Dentistry, Chosun University, Gwangju, 520-825, Korea;
2. Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials,
College of Dentistry, Chosun University, Gwangju, 520-825, Korea）
Abstract:Electrochemical behavior of dental implant system before and after clinical use (in vivo and in vitro) was researched by using abutment and titanium fixture. To simulate an oral environment, the samples of clinically used and non-used implant systems as a working electrode were exposed to artificial saliva at (36.5±1) ℃. Electrochemical tests were carried out using a potentiostat. After electrochemical test, the corrosion morphology of each sample was investigated by FE-SEM and EDS. The corrosion potential and pitting potential of clinically used implant system are lower than those of non-used implant system, and clinically used implant system exhibits a lower range of passivation, indicating a less degree of inherent resistance against chloride ion. The polarization resistance decreases in the case of clinically used implant system, whereas, Rp for clinically non-used implant system increases compared with clinically used implant system.
Key words: dental implants; electrochemical test; titanium fixture; pitting and crevice corrosion
