The efficiency of low-energy electron beam irradiation sterilization in medical institution

2015 Fiscal Year Final Research Report

• Project/Area Number: 25463045
• 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: Meirin College
• Principal Investigator: akiko nomura 明倫短期大学, 歯科技工士学科, 教授 (80134948)
• Co-Investigator(Kenkyū-buntansha): KANATANI Mitsugu 新潟大学, 医歯学系, 助教 (40177499) ; NOMURA Shuichi 新潟大学, 医歯学系, 教授 (40018859) ; ITO Keiichi 明倫短期大学, 歯科技工士学科, 講師 (60389955) ; SANO Yuko 明倫短期大学, 歯科技工士学科, 教授 (30300099)
• Research Collaborator: ITO Kyosuke 新潟大学, 医歯学系 ; HARAGUCHI Dai 浜松ホトニクス株式会社 ; UCHIYAMA Keigo 浜松ホトニクス株式会社 ; KIMURA Jun 浜松ホトニクス株式会社 ; ISHIKAWA Masayoshi 浜松ホトニクス株式会社 ; ISHIKAWA Shunichi 東伸洋行株式会社
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 低エネルギー電子線滅菌 / 低温ガスプラズマ滅菌 / オートクレーブ滅菌 / 純チタン

Outline of Final Research Achievements

The aim of this study was to compare the effects of low-energy electron beam (LEB) irradiation sterilization on cp titanium surface with autoclave and hydrogen peroxide plasma discharging sterilization at low temperature. Mirror-polished, cp titanium disks were sterilized by those three sterilization methods only once. The backscattered electron image and element mapping were analyzed using electron probe micro analyzer. No surface topographical changes were observed on the disks sterilized with LEB, however, the surface was roughened only when autoclaved. There were no differences in the element concentrations of Ti, O, C and Si among those sterilization methods. Therefore, the single sterilization with LEB caused minimal damage on the cp titanium surface.

Free Research Field

歯科補綴学