The development of Ti alloys for dental implant with high corrosion resistance and mechanical strength.
The corrosion behaviors of Ti and Ti-6Al-4V, Ti-6Al-7Nb, Ti-0.5Pt, Ti-6Al-4V-0.5Pt, and Ti-6Al-7Nb-0.5Pt alloys were examined using an electrochemical analyzer in artificial saliva containing 0.1 and 0.2% NaF at a pH of 4.0. The SEM observations revealed that the surfaces of the alloys containing 0.5 wt% Pt were not affected in fluoride-containing environments, whereas the surfaces of Ti, Ti-6A1-4V, and Ti-6Al-7Nb alloys were markedly rough. In artificial saliva containing 0.1% NaF at a pH of 4.0, the amounts of Ti dissolved from the Ti, Ti-6Al-4V, and Ti-6Al-7Nb alloys were about 50 times larger than those of the alloys containing 0.5 wt% Pt. The tensile strengths of the alloys containing 0.5 wt% Pt were equal to or higher than those of pure Ti or the alloys without Pt. The Ti-0.5Pt, Ti-6Al-4V-0.5Pt, and Ti-6Al-7Nb-0.5 alloys are expected to be useful in clinical dentistry as new Ti alloys with high corrosion resistance and mechanical strength.
Yamazoe
Junichi
J
Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
Nakagawa
Masaharu
M
Matono
Yoshinari
Y
Takeuchi
Akari
A
Ishikawa
Kunio
K
D002327:Cariostatic Agents / Q000737:chemistry; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry*; D015921:Dental Implants; D003799:Dental Stress Analysis; D008422:Materials Testing; D008854:Microscopy, Electron; D010984:Platinum / Q000737:chemistry; D012464:Saliva, Artificial; D012969:Sodium Fluoride / Q000737:chemistry; D012995:Solubility; D013499:Surface Properties; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*
D002327:Cariostatic Agents; D003722:Dental Alloys; D015921:Dental Implants; D012464:Saliva, Artificial; D010984:Platinum; D012969:Sodium Fluoride; D014025:Titanium