Microfabrication-based engineering of biomimetic dentin-like constructs to simulate dental aging

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dc.contributor.authorAlvarez, Simon
dc.contributor.authorMorales, Jose
dc.contributor.authorTiozzo-Lyon, Paola
dc.contributor.authorBerrios, Pablo
dc.contributor.authorBarraza, Valentina
dc.contributor.authorSimpson, Kevin
dc.contributor.authorRavasio, Andrea
dc.contributor.authorMonforte Vila, Xavier
dc.contributor.authorTeuschl-Woller, Andreas
dc.contributor.authorSchuh, Christina M. A. P.
dc.contributor.authorAguayo, Sebastian
dc.date.accessioned2024-08-01T08:00:08Z
dc.date.available2024-08-01T08:00:08Z
dc.date.issued2024
dc.description.abstractHuman dentin is a highly organized dental tissue displaying a complex microarchitecture consisting of micrometer-sized tubules encased in a mineralized type-I collagen matrix. As such, it serves as an important substrate for the adhesion of microbial colonizers and oral biofilm formation in the context of dental caries disease, including root caries in the elderly. Despite this issue, there remains a current lack of effective biomimetic in vitro dentin models that facilitate the study of oral microbial adhesion by considering the surface architecture at the micro- and nanoscales. Therefore, the aim of this study was to develop a novel in vitro microfabricated biomimetic dentin surface that simulates the complex surface microarchitecture of exposed dentin. For this, a combination of soft lithography microfabrication and biomaterial science approaches were employed to construct a micropitted PDMS substrate functionalized with mineralized type-I collagen. These dentin analogs were subsequently glycated with methylglyoxal (MGO) to simulate dentin matrix aging in vitro and analyzed utilizing an interdisciplinary array of techniques including atomic force microscopy (AFM), elemental analysis, and electron microscopy. AFM force-mapping demonstrated that the nanomechanical properties of the biomimetic constructs were within the expected biological parameters, and that mineralization was mostly predominated by hydroxyapatite deposition. Finally, dual-species biofilms of Streptococcus mutans and Candida albicans were grown and characterized on the biofunctionalized PDMS microchips, demonstrating biofilm-specific morphologic characteristics and confirming the suitability of this model for the study of early biofilm formation under controlled conditions. Overall, we expect that this novel biomimetic dentin model could serve as an in vitro platform to study oral biofilm formation or dentin-biomaterial bonding in the laboratory without the need for animal or human tooth samples in the future., Our study aimed to develop a novel in vitro microfabricated biomimetic dentin surface that simulates the complex surface microarchitecture of exposed dentin, as well as age-derived glycation of teeth, for the growth of polymicrobial oral biofilms.
dc.description.funderANID (National Research and Development Agency of Chile) through Grant FONDECYT Iniciacion
dc.fechaingreso.objetodigital2024-08-29
dc.format.extent25 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1039/d3lc00761h
dc.identifier.eissn1473-0189
dc.identifier.issn1473-0197
dc.identifier.scopusidSCOPUS_ID:85169836929
dc.identifier.urihttps://doi.org/10.1039/d3lc00761h
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/87233
dc.identifier.wosidWOS:001153504700001
dc.information.autorucFacultad de Medicina; Aguayo Paul, Sebastian Daniel; S/I; 1062336
dc.issue.numero3
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final340
dc.pagina.inicio289
dc.revistaLAB ON A CHIP
dc.rightsacceso restringido
dc.subjectbiophysics
dc.subjectmicrofabrication
dc.subjectmineralization
dc.subjectdental research
dc.subjectinterdiscipinary research
dc.subject.ddc370
dc.subject.deweyEducaciónes_ES
dc.subject.ods03 Good health and well-being
dc.subject.odspa03 Salud y bienestar
dc.titleMicrofabrication-based engineering of biomimetic dentin-like constructs to simulate dental aging
dc.typeartículo
dc.volumen477
sipa.codpersvinculados1062336
sipa.indexWOS
sipa.trazabilidadCarga WOS-SCOPUS;01-08-2024
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