| 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.identifier.uri | http://dx.doi.org/10.53846/goediss-7929 | |
| 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 | |