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Functionalization with fluoride may further enhance AgNPs\u2019 antibacterial efficacy. This study evaluated the impact of fluoridated AgNPs coated with various surface moieties on their safety profile and antibacterial effects against cariogenic bacteria as a potential anti-cariogenic treatment.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>AgNP synthesis followed citrate and gallic acid reduction methods with polyethylene glycol (PEG) and polyvinylpyrrolidone coating. Functionalizing AgNPs with sodium fluoride (NaF) proceeded. Testing the safety of synthesized compounds was done on human gingival fibroblasts and oral epithelial cells. Meanwhile, minimum inhibitory concentration (MIC) determination against <jats:italic>Streptococcus mutans<\/jats:italic> was executed to verify antibacterial activity.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>Gallic-reduced AgNPs revealed higher yielding capacity than citrate-AgNPs. Cytologically, PEGylation reinforced citrate-AgNPs stability and improved IC50 range up to \u223c\u20094.2\u2009\u00d7\u200910<jats:sup>16<\/jats:sup> \u00b5g\/mL and 64.3\u00a0\u00b5g\/mL on fibroblastic and epithelial lineages. PEGylated AgNPs counteracted the cytotoxicity of free NaF with antagonistic combinational effect of NaF@PEG gallic-AgNPs on gingival fibroblasts. Microbiologically, AgNPs recorded an enhanced antimicrobial activity of \u223c\u20095.3\u2009\u00b1\u20092.3\u00a0\u00b5g\/mL averaged MIC against <jats:italic>Streptococcus mutans.<\/jats:italic> Furthermore, fluoridation of PEG gallic-AgNPs depicted an additive antimicrobial propensity.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>This dual action nanoplatform successfully integrates fluoride and silver components, reducing fluoride concentrations to safety range while maximizing silver\u2019s antibacterial properties. Engineered NaF@PEGylated nanosilver formulation represents promising anti-cariogenic strategy that optimizes therapeutic efficacy while maintaining biological safety.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/s12903-025-05691-2","type":"journal-article","created":{"date-parts":[[2025,3,9]],"date-time":"2025-03-09T14:16:42Z","timestamp":1741529802000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Fluoridated silver nanocomposites for caries management: an in-vitro assessment of the cytological and antibacterial profiles"],"prefix":"10.1186","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4781-4293","authenticated-orcid":false,"given":"Marwa M.","family":"Essawy","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Samar N.","family":"Al Achy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dalia M.","family":"Talaat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Magda M.","family":"El-Tekeya","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sara","family":"Essa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nouran","family":"Nabil","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7654-2493","authenticated-orcid":false,"given":"Nour","family":"Ammar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,3,9]]},"reference":[{"key":"5691_CR1","doi-asserted-by":"publisher","first-page":"228","DOI":"10.1111\/omi.12132","volume":"31","author":"W Bowen","year":"2016","unstructured":"Bowen W. 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