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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 4    August 2009

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Electrochemical behavior of dental implant system before and after clinical use
Chae-Heon CHUNG1, Hee-Jung KIM1, Yong-Tae JEONG1, Mee-Kyoung SON1,
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

ISSN 1672-7029
CN 43-1423/U

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