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Polyurethane\u2010based elastomeric ligatures were coated with silver and bismuth nanofilms via direct current magnetron sputtering. Surface roughness (<jats:italic>R<\/jats:italic><jats:sub>a<\/jats:sub>) and surface\u2010free energy (SFE) were assessed. Coated specimens were incubated with <jats:italic>S. mutans<\/jats:italic> for 2 h. Adhering bacteria were visualized by Hoechst staining and quantified by an ATP\u2010based luminescence assay. One\u2010way analysis of variance with Tukey post hoc testing and Pearson correlation analysis were performed (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05) to relate bacterial adhesion to surface roughness and surface\u2010free energy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Elastomeric ligatures were successfully coated with silver and bismuth nanofilms. <jats:italic>R<\/jats:italic><jats:sub>a<\/jats:sub> was significantly reduced by silver coating. Silver and bismuth coatings showed significantly higher SFE than controls. Adhesion of <jats:italic>S. mutans<\/jats:italic> was significantly decreased by silver coating. No correlation between bacterial adhesion and SFE was found. Correlation between bacterial adhesion and <jats:italic>R<\/jats:italic><jats:sub>a<\/jats:sub> was positive but not statistically significant.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Magnetron sputtering proved to be a feasible method to equip orthodontic elastomeric ligatures with silver and bismuth nanofilms. Silver coatings of elastomeric ligatures may reduce white spots and carious lesions in orthodontic patients. Future research is required to stabilize coatings.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cre2.864","type":"journal-article","created":{"date-parts":[[2024,3,4]],"date-time":"2024-03-04T04:20:26Z","timestamp":1709526026000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Antibacterial coating of orthodontic elastomeric ligatures with silver and bismuth nanofilms by magnetron sputtering:\u00a0A\u00a0feasibility study"],"prefix":"10.1002","volume":"10","author":[{"given":"Andrea","family":"Schubert","sequence":"first","affiliation":[{"name":"Department of Prosthodontics University Medical Center Goettingen Goettingen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carolin","family":"Griesm\u00fcller","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics University Medical Center Goettingen Goettingen 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