Antioxidant and osteogenic properties on a modified titanium implant

2014 Fiscal Year Final Research Report

• Project/Area Number: 24592966
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Dental engineering/Regenerative dentistry
• Research Institution: Showa University
• Principal Investigator: SHIBATA Yo 昭和大学, 歯学部, 助教 (30327936)
• Co-Investigator(Kenkyū-buntansha): MIYAZAKI Takashi 昭和大学, 歯学部, 教授 (40175617) ; MISHIMA Kenji 昭和大学, 歯学部, 教授 (50275343) ; YAMADA Atsushi 昭和大学, 歯学部, 講師 (50407558) ; YOSHIDA Misato 昭和大学, 歯学部, 兼任講師 (50555109)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: チタン / インプラント / 酸化ストレス / 細胞

Outline of Final Research Achievements

Cells adhering onto implant surfaces are subjected to oxidative stress during wound healing processes. Although titanium and its alloys are among the most frequently used biomaterials in orthopedic and dental implants, titanium surfaces do not have antioxidant properties, and cells grown on these surfaces can show permanent oxidative stress. The present study assessed the antioxidant property and osteogenic properties of titanium samples with or without oxidation treatments. A thick rutile TiO2 film was observed on thermally oxidized titanium surfaces, while amorphous anatase TiO2 formed on anodically oxidized titanium surfaces prepared by discharging in 1 M Na2HPO4. A resistance to the depletion of reduced glutathione in adherent osteoblasts, which correlates with antioxidant behavior, occurred on anodically oxidized titanium. Enhanced osteogenic gene expressions and nano-biomechanical properties of mineralized tissue were achieved on anodically oxidized titanium.

Free Research Field

歯科理工学