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Sodium hypochlorite, the gold-standard irrigant, is effective but has significant cytotoxic effects, prompting the need for safer alternatives. This study investigates the cytotoxicity, cell proliferation, adhesion to dentin, and osteogenic differentiation of cells exposed to Dual Rinse HEDP, curcumin, and sodium hypochlorite (2.5%) for 1, 5, and 15\u00a0min, focusing on their potential application in revitalization and regenerative endodontic protocols.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methodology<\/jats:title>\n            <jats:p>Samples were assigned to groups based on the irrigant used: control, HEDP, curcumin, or sodium hypochlorite (2.5%) for exposure durations of 1, 5, and 15\u00a0min. Cytotoxicity was assessed using the MTT assay, with optical density measured at the specified times. Cell proliferation was evaluated via the Trypan blue exclusion test, with viable cells counted using a hemocytometer. Data were presented as mean and standard deviation (SD) values and statistical significance was set at <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05 for all tests. Cell adherence to dentin discs was analyzed using scanning electron microscopy (SEM) after 5-min irrigant exposure. Osteogenic differentiation was assessed through alizarin red staining for calcium deposition and quantitative PCR analysis of BMP-2, TGF-\u03b21, VEGF, and DSPP gene expression.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>Cell cytotoxicity differed significantly across groups (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05), with HEDP showing the best results at 1 and 5\u00a0min. After 15\u00a0min, Group II had the highest value, followed by Group I. HEDP also recorded the highest cell proliferation, followed by curcumin. HEDP exhibited substantial calcium deposition and significantly upregulated BMP-2, TGF-\u03b21, VEGF, and DSPP gene expression, surpassing other materials. Curcumin moderately promoted calcified nodule formation. Osteogenic media also induced significant gene upregulation.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>Dual Rinse HEDP and curcumin are tissue-friendly. Dual rinse HEDP efficiently increases stem cell adherence to dentin discs and their osteogenic differentiation.<\/jats:p>\n            <jats:p>So, this irrigant has the potential to be used in regeneration protocols.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/s12903-025-05550-0","type":"journal-article","created":{"date-parts":[[2025,2,3]],"date-time":"2025-02-03T10:50:56Z","timestamp":1738579856000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Tissue-friendly dentin treatments as a potential element in revascularization protocol (ex-vivo study)"],"prefix":"10.1186","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9992-1218","authenticated-orcid":false,"given":"Hala Fayek","family":"Khalil","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3055-5643","authenticated-orcid":false,"given":"Nadia Ezz El Din","family":"Metwalli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5758-513X","authenticated-orcid":false,"given":"Sara","family":"Magdy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0061-5163","authenticated-orcid":false,"given":"Mohamed","family":"Shamel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,2,3]]},"reference":[{"key":"5550_CR1","first-page":"74","volume-title":"Sturdevant\u2019s Art & Science of Operative Dentistry","author":"TM Roberson","year":"2006","unstructured":"Roberson TM, Heymann H, Swift EJ, Sturdevant CM. 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Aust Endod J. 2022;48:481\u20136.","DOI":"10.1111\/aej.12599"}],"container-title":["BMC Oral Health"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s12903-025-05550-0.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1186\/s12903-025-05550-0\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s12903-025-05550-0.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,2,3]],"date-time":"2025-02-03T21:51:10Z","timestamp":1738619470000},"score":1,"resource":{"primary":{"URL":"https:\/\/bmcoralhealth.biomedcentral.com\/articles\/10.1186\/s12903-025-05550-0"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,2,3]]},"references-count":49,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2025,12]]}},"alternative-id":["5550"],"URL":"https:\/\/doi.org\/10.1186\/s12903-025-05550-0","relation":{},"ISSN":["1472-6831"],"issn-type":[{"value":"1472-6831","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,2,3]]},"assertion":[{"value":"19 November 2024","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"24 January 2025","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"3 February 2025","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The British University in Egypt's Faculty of Dentistry's Research Ethics Committee approved the study protocol (FD BUE REC 21\u2013032).Informed consent to participate was deemed unnecessary to the British University in Egypt's Faculty of Dentistry's Research Ethics Committee because the teeth used in this study were extracted in the oral surgery department in the Faculty of Dentistry. This study was conducted in accordance with the guidelines and regulations for research involving human tissues, as established by the Ethical Review Board of the Faculty of Dentistry at the British University in Egypt.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not Applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"184"}}