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dc.contributor.advisor Wiegand, Annette Prof. Dr.
dc.contributor.author Manzke, Marietta Simone
dc.date.accessioned 2020-05-25T12:28:17Z
dc.date.available 2020-08-14T22:50:03Z
dc.date.issued 2020-05-25
dc.identifier.uri http://hdl.handle.net/21.11130/00-1735-0000-0005-13A6-A
dc.language.iso deu de
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc 610 de
dc.title Physikochemische und bioaktive Eigenschaften von mit Methacryl-funktionalisierten Silica-Nanopartikeln modifizierten experimentellen Adhäsiven de
dc.type doctoralThesis de
dc.title.translated Physico-chemical and bioactive properties of methacryl-functionalized silica-nanoparticles modified experimental adhesives de
dc.contributor.referee Miosge, Nicolai Prof. Dr.
dc.date.examination 2020-06-02
dc.description.abstracteng Aim: The aim of the study was to investigate the physico-chemical and bioactive properties of experimental dental adhesives containing methacryl-functionalized polyhedral oligomeric silsesquioxane (MA-POSS-8).  Methods: Six different compositions of experimental adhesives based on BisGMA, TEGDMA and HEMA were prepared and infiltrated with MA-POSS-8 (5 wt%). Unfilled adhesives served as control. Camphorquinone and 2-(Dimethyl-amino)ethylmethacrylate were added as initiators to enable light-induced polymerization. The physico-chemical properties (degree of conversion, viscosity, Martens hardness, indentation modulus, water sorption and sol fraction) were analysed. Dispersion and hydrodynamic radius of MA-POSS-8 were investigated by dynamic light scattering. Precipitation of Ca/P was measured on the specimens after storage in artificial saliva for 28 days at 37°C. Statistical analysis was performed by two-way ANOVA and Tukeys post-hoc tests (p < 0.05).  Results: For all experimental adhesives, degree of conversion and water sorption were not affected by the addition of MA-POSS-8. Sol fraction was below the detection limit. The addition of MA-POSS-8 led to a reduction in shear and complex viscosity in the adhesive with higher concentration of BisGMA (BisGMA: 60 wt%, TEGDMA: 15 wt%, HEMA: 25 wt%). The particles also led to a reduction in the Martens hardness and indentation modulus in one adhesive (BisGMA: 50 wt%; TEGDMA: 25 wt%, HEMA: 25 wt%). Formation of Ca/P precipitates could be shown on the specimens of all groups.  Conclusion: MA-POSS-8 did not improve the bioactive potential and did not affect the material properties by except for slight differences in Martens hardness, indentation modulus, complex and shear viscosity. de
dc.contributor.coReferee Oppermann, Martin Prof. Dr.
dc.subject.ger Hybridschicht, Degradation, MA-POSS-8, Bioaktivität, Adhäsivtechnik de
dc.subject.eng hybrid layer, degradation, MA-POSS-8, bioactivity, adhesive de
dc.identifier.urn urn:nbn:de:gbv:7-21.11130/00-1735-0000-0005-13A6-A-7
dc.affiliation.institute Medizinische Fakultät de
dc.subject.gokfull Zahn-, Mund- und Kieferheilkunde - Allgemein- und Gesamtdarstellungen (PPN619876360) de
dc.description.embargoed 2020-08-14
dc.identifier.ppn 1698782888

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