Ronen Shika Igaku
Online ISSN : 1884-7323
Print ISSN : 0914-3866
ISSN-L : 0914-3866
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  • Haruka Fukumoto, Ryosuke Inoue, Akiko Fujiwara, Shinsuke Mizutani, Har ...
    2025Volume 40Issue 2 Pages 112-120
    Published: 2025
    Released on J-STAGE: October 23, 2025
    JOURNAL FREE ACCESS
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  • Erika Kakuta, Ayuko Takao, Ayako Okada, Takeo Suga, Masako Nakano
    2025Volume 40Issue 2 Pages 121-128
    Published: 2025
    Released on J-STAGE: October 23, 2025
    JOURNAL FREE ACCESS

     Objective:This study experimentally investigated the effect of a portable vacuum on aerosol generation during home-visit dental treatment of older adults.

     Method:To simulate Fowlerʼs position, a phantom head was fixed to the dental chair at 45°. Dental treatments, including brushing using a toothbrush, professional mechanical tooth cleaning by contra-angle with or without water flow(PMTCw or PMTC), respectively, and tooth operative care at a 1:5 speed-up contra-angle(×5 SCA), were performed on the dental jaw model of the phantom. To evaluate the aerosol dispersion, the experimental dental treatments were captured using a high-speed camera(170 fps), and the aerosol-occupied area in each image was analyzed using ImageJ. The log10(area %)values obtained from each dental treatment(n=6)were statistically analyzed.

     Results:The aerosol amounts observed after all dental treatments were significantly higher than those in the background(no dental treatment), indicating that these treatments generated aerosols. The use of a portable vacuum significantly reduced aerosol amounts in the PMTCw, PMTC, and ×5 SCA, but not in brushing. In the multiple regression analysis of the aerosol amount, all dental procedures in this study had positive coefficients, and the vacuum effect was negative(p<0.001).

     Conclusion:Although oral care using a toothbrush was the most common treatment for home-visit dental treatments, the experimental results showed that it was the most difficult method to control aerosol generation. Therefore, to protect dental staff from infective aerosols, proper use of a vacuum, proper use of personal protective equipment(PPE)and proper ventilation should be performed.

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Report on Survey
  • Takayuki Ueda, Ayaka Hori, Yasuhiro Horibe, Midori Ohta, Masahiro Ryu
    2025Volume 40Issue 2 Pages 129-133
    Published: 2025
    Released on J-STAGE: October 23, 2025
    JOURNAL FREE ACCESS

     口腔機能低下症と診断された患者に対しては適切な口腔機能管理を実施することが求められる。しかし,算定要件により口腔機能管理料の算定対象とならない患者が存在していると考えられる。そこで本研究は,口腔機能低下症の診断のための口腔機能検査法の組み合わせと口腔機能管理料の算定可否との関係を明らかにすることを目的とした。

     東京歯科大学水道橋病院補綴科を定期健診で訪れた65歳以上の患者で,口腔機能低下症と診断された80名を対象とした。本研究では口腔不潔を①-1:細菌カウンタ,①-2:TCI,咬合力低下を③-1:感圧フィルム,③-2:残存歯に分け,組み合わせを変えて評価した。条件ⅰ)①-1と③-1,条件ⅱ)①-2と③-2の組み合わせで,a )口腔機能低下症の割合,b )口腔機能低下症かつ,口腔機能管理料算定可能な割合を算出した。

     条件ⅰ-a(取り込み基準と同じ)とⅰ-bは100%,条件ⅱ-aは86.3%,ⅱ-bは56.3%であった。本研究より,算定要件である4つの検査をすべて実施できる歯科医療機関では,口腔機能管理料による口腔機能管理がおおむね実施できていると思われる。一方で,条件ⅱの結果から,必要な口腔機能管理の対象とならずに取りこぼされる患者がいる可能性があると考えられる。検査機器の普及の途中である現在においては,口腔機能低下症と診断されたすべての患者が必要な管理を受けることができる対応が求められる。

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