| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1987: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1986: ¥700,000 (Direct Cost: ¥700,000)
|
|---|
| Research Abstract |
This study aims to evaluate the in vitro corrosion characteristics of titaium alloys used for dental purposes. Alloys Ti-Al binary system, Ti-Cu binary system, Ti-Ni binary system, Ti-6Al4V, Ti-55Ni, Ti-13Cu, Ti-5Al-8Cu alloys were investigated in terms of electrochemical behavior , weight change, tarnish analysis, and metal component dissolution in artificial saliva.
The natural potential region of titanium alloys that contain more than 50% titanium was getween -0.1V and -0.6V. The polarization resistance of the titanium alloys was 30 - 50X10^5ohm .cm^2. The braakdown potential of the titanium alloys were nonetheless above 1.0V. Titanium alloys were the less susceptibel to tarnish than gold dental alloys. Although, after 12 weeks, no evident weight loss was observed in these titanium alloys, Ni was found to dissolve slightly from Ti-Ni binary alooy and Cu was dissolved slightly from alloys containing it. these sdata show taht the corrosion resistance of the titanium alloys investigate is higher than that of dental use gold alloy.
|
