2023 Fiscal Year Final Research Report

Study for establishing aerosol infection prevention measures during dental practice

Research Project

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Project/Area Number	21K10056
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 57060:Surgical dentistry-related
Research Institution	Fujita Health University
Principal Investigator	Satoh Koji 藤田医科大学, 医学部, 准教授 (90235341)
Co-Investigator(Kenkyū-buntansha)	金ミンジョン藤田医科大学, 医学部, 客員助手 (50970175) 椎名哲郎藤田医科大学, 医学部, 助手 (10969843) 田母神菜帆藤田医科大学, 医学部, 助手 (20969753)
Project Period (FY)	2021-04-01 – 2024-03-31
Keywords	エアロゾル / サージカルスモーク / COVID-19 / 歯科診療 / 吸引装置 / 微粒子可視化システム / 感水試験紙
Outline of Final Research Achievements	The spread of airborne droplets and surgical smoke produced in dental procedures and reduction effect of their dispersion by suction devices (intraoral and external vacuum) were observed using a particles visualization system and a water-sensitive paper test. When an intraoral vacuum was used, the amount of airborne droplets dispersal decreased in all directions, and even in a single use of extraoral vacuum, a certain reduction in the amount of airborne droplets dispersal was confirmed. When used in combination, the amount of dispersal was further reduced. Surgical smoke rose in the practitioner's face area when only a intraoral vacuum was used, but most of it was suctioned in only a extraoral vacuum use, and the amount of dispersal was further reduced in the combination use. It was visually and quantitatively confirmed that the combination use of intraoral and external vacuum significantly reduced spread of airborne droplets and surgical smoke exposure produced in dental procedures.
Free Research Field	口腔外科
Academic Significance and Societal Importance of the Research Achievements	歯科領域では様々な処置でエアロゾルが発生するため、飛沫、接触感染防止のための標準予防策に加えて、換気、口腔外バキュームの活用が推奨されているが、エアロゾルについての気流解析、換気と口腔内、口腔外バキューム併用によるエアロゾル拡散抑制効果については十分な検証が行われていなかった。歯科診療中のエアロゾルやサージカルスモークの発生と拡散についての気流解析と換気や口腔内、口腔外バキューム併用によるエアロゾル拡散抑制効果を検証した今回の研究は、歯科診療中のエアロゾル感染予防対策確立に寄与するものであり、ウイズおよびアフターコロナ時代の歯科診療における感染症対策として有益と考える。