Rizk, Marta

[["dc.bibliographiccitation.artnumber","3862"],["dc.bibliographiccitation.issue","21"],["dc.bibliographiccitation.journal","Nanomaterials"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Kreutz, Marietta"],["dc.contributor.author","Kreutz, Christian"],["dc.contributor.author","Kanzow, Philipp"],["dc.contributor.author","Tauböck, Tobias T."],["dc.contributor.author","Burrer, Phoebe"],["dc.contributor.author","Noll, Christine"],["dc.contributor.author","Bader, Oliver"],["dc.contributor.author","Rohland, Bianca"],["dc.contributor.author","Wiegand, Annette"],["dc.contributor.author","Rizk, Marta"],["dc.date.accessioned","2022-12-01T08:31:45Z"],["dc.date.available","2022-12-01T08:31:45Z"],["dc.date.issued","2022-11-01"],["dc.description.abstract","The aim of the study was to examine the applicability of bioactive and antibacterial nanoparticles to an experimental adhesive. The adhesive (60 wt% BisGMA, 15 wt% TEGDMA, 25 wt% HEMA) was mixed with combinations of 5 wt% methacryl-functionalized polyhedral oligomeric silsesquioxane (MA-POSS) and one kind of bioactive/antibacterial nanoparticles: 1 wt% core-shell silica-silver nanoparticle (SiO2@Ag), 1 wt% bioactive glass with bismuth (BAG-Bi) or 1 wt% calcium phosphate (CAP). Pure adhesive served as control. The physicochemical (degree of conversion (DC), linear shrinkage (LS), shear and complex viscosity, water sorption (WS), sol fraction (SF)), biological (antimicrobial effect) and bioactive (mineral precipitation) properties were investigated. DC and LS remained unchanged. The combination of BAG-Bi/MA-POSS resulted in a significantly increased WS and SF compared to control. In addition, the combination of CAP/MA-POSS slightly increased the shear viscosity of the adhesive. The addition of the nanoparticles did not influence the antimicrobial effects compared to the pure adhesive. Improved mineral inducing capacity could be detected in all nanoparticle combinations. The combination of bioactive and/or antibacterial nanoparticles showed improved mineral inducing capacity, but no antibacterial properties. The material properties were not or only slightly affected."],["dc.identifier.doi","10.3390/nano12213862"],["dc.identifier.pii","nano12213862"],["dc.identifier.pmcid","PMC9694625"],["dc.identifier.pmid","36364638"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/118257"],["dc.identifier.url","https://www.mdpi.com/2079-4991/12/21/3862"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-621"],["dc.relation.eissn","2079-4991"],["dc.relation.orgunit","Poliklinik für Präventive Zahnmedizin, Parodontologie und Kariologie"],["dc.rights","CC BY 4.0"],["dc.subject.gro","bioactive nanoparticles"],["dc.subject.gro","antimicrobial nanoparticles"],["dc.subject.gro","dental adhesive"],["dc.subject.gro","POSS"],["dc.subject.gro","SiO2@Ag"],["dc.subject.gro","calcium phosphate"],["dc.subject.gro","bioactive glass"],["dc.title","Effect of Bioactive and Antimicrobial Nanoparticles on Properties and Applicability of Dental Adhesives"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","343"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Oral Science"],["dc.bibliographiccitation.lastpage","350"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Kanzow, Philipp"],["dc.contributor.author","Baxter, Steffi"],["dc.contributor.author","Rizk, Marta"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Wiegand, Annette E."],["dc.date.accessioned","2019-07-09T11:51:57Z"],["dc.date.accessioned","2020-05-22T07:22:36Z"],["dc.date.available","2019-07-09T11:51:57Z"],["dc.date.available","2020-05-22T07:22:36Z"],["dc.date.issued","2019-06-18"],["dc.description.abstract","The study aimed to compare the repair bond strength of aged composite and amalgam repaired with resin composite after various mechanical and adhesive surface treatments. Specimens were aged by thermal cycling (10,000 cycles, 5-55°C) and randomly subjected to one of three surface treatments: diamond bur abrasion, aluminum oxide air abrasion, or silica coating. Conventional bonding or a universal adhesive with incorporated silane was applied afterward (each n = 16) and resin composite was attached. In the control groups (each n = 16), resin composite was attached using one of the above adhesives without prior mechanical surface conditioning. After further thermal cycling, the shear bond strength (SBS) and failure modes were assessed. Statistical analyses were performed using ANOVA, Weibull statistics, two sample t-tests, and Chi2-test (P < 0.05). The SBS of the repaired amalgam was significantly lower than that of the composite and mechanical pretreatment significantly increased SBS. The universal adhesive significantly improved the SBS of the repaired amalgam compared to the conventional bonding agent and mechanical pretreatment increased the number of cohesive/mixed failures. Amalgam restorations may be repaired using resin composites, but the resulting SBS is lower than that obtained with composite."],["dc.identifier.doi","10.2334/josnusd.18-0301"],["dc.identifier.pmid","31217385"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16247"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60050"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65687"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.eissn","1880-4926"],["dc.relation.issn","1343-4934"],["dc.relation.orgunit","Poliklinik für Präventive Zahnmedizin, Parodontologie und Kariologie"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","610"],["dc.subject.gro","amalgam"],["dc.subject.gro","composite"],["dc.subject.gro","dental restoration failure"],["dc.subject.gro","dental restoration repair"],["dc.subject.gro","shear bond strength"],["dc.title","Effectiveness of a universal adhesive for repair bonding to composite and amalgam"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]