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dc.contributor.authorCámara-Torres, María
dc.contributor.authorDuarte, Stacy
dc.contributor.authorSinha, Ravi
dc.contributor.authorEgizabal, Ainhoa
dc.contributor.authorÁlvarez, Noelia
dc.contributor.authorBastianini, Maria
dc.contributor.authorSisani, Michele
dc.contributor.authorScopece, Paolo
dc.contributor.authorScatto, Marco
dc.contributor.authorBonetto, Alessandro
dc.contributor.authorMarcomini, Antonio
dc.contributor.authorSanchez, Alberto
dc.contributor.authorPatelli, Alessandro
dc.contributor.authorMota, Carlos
dc.contributor.authorMoroni, Lorenzo
dc.date.accessioned2020-10-28T16:55:20Z
dc.date.available2020-10-28T16:55:20Z
dc.date.issued2021-04
dc.identifier.citationCámara-Torres, María, Stacy Duarte, Ravi Sinha, Ainhoa Egizabal, Noelia Álvarez, Maria Bastianini, Michele Sisani, et al. “3D Additive Manufactured Composite Scaffolds with Antibiotic-Loaded Lamellar Fillers for Bone Infection Prevention and Tissue Regeneration.” Bioactive Materials 6, no. 4 (April 2021): 1073–1082. doi:10.1016/j.bioactmat.2020.09.031.en
dc.identifier.issn2452-199Xen
dc.identifier.urihttp://hdl.handle.net/11556/1009
dc.description.abstractBone infections following open bone fracture or implant surgery remain a challenge in the orthopedics field. In order to avoid high doses of systemic drug administration, optimized local antibiotic release from scaffolds is required. 3D additive manufactured (AM) scaffolds made with biodegradable polymers are ideal to support bone healing in non-union scenarios and can be given antimicrobial properties by the incorporation of antibiotics. In this study, ciprofloxacin and gentamicin intercalated in the interlamellar spaces of magnesium aluminum layered double hydroxides (MgAl) and α-zirconium phosphates (ZrP), respectively, are dispersed within a thermoplastic polymer by melt compounding and subsequently processed via high temperature melt extrusion AM (~190 °C) into 3D scaffolds. The inorganic fillers enable a sustained antibiotics release through the polymer matrix, controlled by antibiotics counterions exchange or pH conditions. Importantly, both antibiotics retain their functionality after the manufacturing process at high temperatures, as verified by their activity against both Gram + and Gram - bacterial strains. Moreover, scaffolds loaded with filler-antibiotic do not impair human mesenchymal stromal cells osteogenic differentiation, allowing matrix mineralization and the expression of relevant osteogenic markers. Overall, these results suggest the possibility of fabricating dual functionality 3D scaffolds via high temperature melt extrusion for bone regeneration and infection prevention.en
dc.description.sponsorshipWe are grateful to the FAST project funded under the H2020-NMP- PILOTS-2015 scheme (GA n. 685825) for financial support. Some of the materials used in this work were provided by the Texas A&M Health Science Center College of Medicine Institute for Regenerative Medicine at Scott & White through a grant from NCRR of the NIH (Grant #P40RR017447).en
dc.language.isoengen
dc.publisherKeAi Communications Co.en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.title3D additive manufactured composite scaffolds with antibiotic-loaded lamellar fillers for bone infection prevention and tissue regenerationen
dc.typejournal articleen
dc.identifier.doi10.1016/j.bioactmat.2020.09.031en
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/685825/EU/Functionally graded Additive Manufacturing scaffolds by hybrid manufacturing/FASTen
dc.rights.accessRightsopen accessen
dc.subject.keywordsMelt extrusion additive manufacturingen
dc.subject.keywordsAntibiotic deliveryen
dc.subject.keywordsLamellar inorganic fillersen
dc.subject.keywordsBone infectionen
dc.subject.keywordsBone regenerationen
dc.subject.keywordsHuman mesenchymal stromal cellsen
dc.issue.number4en
dc.journal.titleBioactive Materialsen
dc.page.final1082en
dc.page.initial1073en
dc.volume.number6en


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