Abstract
Titanium has been selected as the materials for several dental devices because of its excellent mechanical properties, biocompatibility, development of casting process and corrosion resistance to chloride solutions.Besides, fluoride is well utilized as an anticariogenic agent showing the reduction of demineralization, the enhancement of remineralization, the interference of pellicle and plaque formation, the inhibition of microbial growth and metabolism, and others. However, Ti has a nature to dissolve in aqueous fluoride solutions, so that there have been some reports regarding corrosion problem of the titanium dental devices. One of the countermeasure to the problem is to develop a new titanium alloy resistant to corrosion in the fluoride solutions. Therefore, the paper aims to introducing the overview of corrosion behavior of Ti in fluoride solutions and some recent trials to development of new Ti alloys corrosion-resistant to the fluoride solution.
