Effect of Excimer UV lamp radiation on titanium modified by Wire-type EDM

2015 Fiscal Year Final Research Report

• Project/Area Number: 25463019
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Showa University
• Principal Investigator: Kataoka Yu 昭和大学, 歯学部, 助教 (90527300)
• Co-Investigator(Kenkyū-buntansha): SHIBATA Yo 昭和大学, 歯学部, 講師 (30327936)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: チタン / ワイヤ放電加工 / エキシマUVランプ / ナノインデンテーション

Outline of Final Research Achievements

The purpose of this study is to investigate the surface characteristics and biocompatibility of titanium (Ti) surfaces modified by wire electrical discharge machining (EDM). EDM surface characteristics were evaluated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), thin-film X-ray diffractometry (XRD) and contact angle measurements. The bone substance were evaluated by nano-indentation test. EDM surfaces exhibited high super hydrophilicity, due to high surface energy. XPS and XRD revealed that a passive oxide layer with certain developing thickness onto. EDM surfaces promoted cell attachment, but restrained proliferation. Real-time PCR analyses showed significantly higher relative mRNA expression levels of osteoblastic genes in cells cultured on the EDM surfaces as compared to cells cultured on the machined surfaces and the bone substance on the EDM surfaces was equivalent to cortical bone.

Free Research Field

歯科理工学