N. Takahashi, T. Yamagata, Shuhei Mineo, Kota Kato, K. Tabeta
: Aerosol infection is one of the routes of transmission of the new coronavirus (COVID-19), which continues to rage around the world. Aerosols generated by ultrasonic scalers, which are fre-quently used in periodontal treatment, are of concern as a source of cross-infection, but the characteristics of the aerosols are not clear. The purpose of this study was to investigate the characteristics of aerosols generated by ultrasonic scalers through fluid engineering studies using a particulate visualization system, and to evaluate the effectiveness of intra- and extraoral suction devices in preventing aerosol diffusion through simulated clinical studies using water-sensitive test papers and particle counters. From the fluid engineering study, the average particle size of the aerosol generated by the ultrasonic scaler was found to be about 40 μ m, and the droplet velocity to be 3 m/s. A clinical study using water-sensitive test papers revealed the effect of the orientation of the ultrasonic scaler on the direction of aerosol dis-persal. In addition, analysis using a particle counter showed that the amount of aerosol with a particle size of 1-10 μ m dispersed decreased with the distance, and it was confirmed that the amount of aerosol decreased significantly with the use of intra-oral vacuum suction. These results suggest that the risk of cross-infection via aerosols can be suppressed by appropriate use of a suction device for aerosols of vari-ous particle sizes generated by ultrasonic scalers.
{"title":"Characteristics of Aerosols Generated from an Ultrasonic Scaling Device and Prevention of Diffusion by Intra- and Extraoral Suction Devices","authors":"N. Takahashi, T. Yamagata, Shuhei Mineo, Kota Kato, K. Tabeta","doi":"10.2329/perio.63.171","DOIUrl":"https://doi.org/10.2329/perio.63.171","url":null,"abstract":": Aerosol infection is one of the routes of transmission of the new coronavirus (COVID-19), which continues to rage around the world. Aerosols generated by ultrasonic scalers, which are fre-quently used in periodontal treatment, are of concern as a source of cross-infection, but the characteristics of the aerosols are not clear. The purpose of this study was to investigate the characteristics of aerosols generated by ultrasonic scalers through fluid engineering studies using a particulate visualization system, and to evaluate the effectiveness of intra- and extraoral suction devices in preventing aerosol diffusion through simulated clinical studies using water-sensitive test papers and particle counters. From the fluid engineering study, the average particle size of the aerosol generated by the ultrasonic scaler was found to be about 40 μ m, and the droplet velocity to be 3 m/s. A clinical study using water-sensitive test papers revealed the effect of the orientation of the ultrasonic scaler on the direction of aerosol dis-persal. In addition, analysis using a particle counter showed that the amount of aerosol with a particle size of 1-10 μ m dispersed decreased with the distance, and it was confirmed that the amount of aerosol decreased significantly with the use of intra-oral vacuum suction. These results suggest that the risk of cross-infection via aerosols can be suppressed by appropriate use of a suction device for aerosols of vari-ous particle sizes generated by ultrasonic scalers.","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91516941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Kawamoto, N. Sugano, Shouhei Ogisawa, H. Shiratsuchi, Keisuke Seki, Soichiro Manaka, N. Yoshinuma, S. Sato
{"title":"Equol testing and supplementation for patients with desquamative gingivitis (The second report) : case reports","authors":"A. Kawamoto, N. Sugano, Shouhei Ogisawa, H. Shiratsuchi, Keisuke Seki, Soichiro Manaka, N. Yoshinuma, S. Sato","doi":"10.2329/perio.63.205","DOIUrl":"https://doi.org/10.2329/perio.63.205","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82826569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hinokitiol acts against Porphyromonas gingivalis by inhibiting Autoinducer-2","authors":"Shoko Hamada, M. Gomi, Akihiro Yoshida","doi":"10.2329/perio.63.183","DOIUrl":"https://doi.org/10.2329/perio.63.183","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80596175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Shimabukuro, K. Sawada, Mami Koshimizu, Kazuko Shinada, Harumi Asai, Ayumi Mizoguchi, Y. Hayashi, Haruna Tsukamoto, Midori Miyago, Huuka Nishihara, Takako Nishibata, Michiyo Shimabukuro, Tomoaki Iwayama, C. Fujiwara, M. Takedachi, Shinya Murakami
{"title":"Patient Characterization according to the New Classification of Periodontitis and Performance of the Latter as a Predictor of Tooth Loss","authors":"Y. Shimabukuro, K. Sawada, Mami Koshimizu, Kazuko Shinada, Harumi Asai, Ayumi Mizoguchi, Y. Hayashi, Haruna Tsukamoto, Midori Miyago, Huuka Nishihara, Takako Nishibata, Michiyo Shimabukuro, Tomoaki Iwayama, C. Fujiwara, M. Takedachi, Shinya Murakami","doi":"10.2329/perio.63.129","DOIUrl":"https://doi.org/10.2329/perio.63.129","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91389953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of an artificial intelligence model using an automatic detection of furcation involvement through panoramic radiography","authors":"Satoshi Tajima, C. Sonoda, Takashi Kobayashi","doi":"10.2329/perio.63.119","DOIUrl":"https://doi.org/10.2329/perio.63.119","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81070033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Inhibitory effects of hinokitiol and Paeonia albiflora root extract against infection of gingival epithelial cells by Porphyromonas gingivalis","authors":"Mizuki Inagaki, Hiroyoshi Ohtani","doi":"10.2329/perio.63.143","DOIUrl":"https://doi.org/10.2329/perio.63.143","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85532050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The possible mechanism of gastrointestinal cancer development and progression by periodontopathogenic bacteria","authors":"N. Takahashi, K. Tabeta","doi":"10.2329/perio.63.151","DOIUrl":"https://doi.org/10.2329/perio.63.151","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81959794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimal dimension of peri-implant mucosa in the molar region","authors":"Joichiro Hayashi, K. Shin","doi":"10.2329/perio.63.113","DOIUrl":"https://doi.org/10.2329/perio.63.113","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75932879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A 15-year Follow-up Case of Periodontal Treatment of a Patient with Chronic Periodontitis Focusing on the Changes in her Living Environment and Systemic Condition","authors":"Rie Kobayashi, Hideo Arai, Maya Asanuma, Tetsuya Hara","doi":"10.2329/perio.63.158","DOIUrl":"https://doi.org/10.2329/perio.63.158","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77608836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Basic research on cytokine and cell therapy to establish a novel promising strategy for periodontal tissue regeneration","authors":"M. Kajiya","doi":"10.2329/perio.63.105","DOIUrl":"https://doi.org/10.2329/perio.63.105","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78748772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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