Sydow, Hans-Georg

[["dc.bibliographiccitation.firstpage","1753"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Clinical Oral Investigations"],["dc.bibliographiccitation.lastpage","1759"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Roedig, Tina"],["dc.contributor.author","Endres, Sarah"],["dc.contributor.author","Konietschke, Frank"],["dc.contributor.author","Zimmermann, Ortrud"],["dc.contributor.author","Sydow, Hans Georg"],["dc.contributor.author","Wiegand, Annette"],["dc.date.accessioned","2018-11-07T10:23:17Z"],["dc.date.available","2018-11-07T10:23:17Z"],["dc.date.issued","2017"],["dc.description.abstract","This in vitro study evaluated the effect of fiber insertion depth on antimicrobial efficacy of antimicrobial photodynamic therapy (aPDT) using a photosensitizer (PS; toluidine blue) and a red light-emitting diode (LED) in root canals infected with Enterococcus faecalis. Single-rooted extracted teeth were prepared with nickel-titanium-instruments, sterilized, contaminated with E. faecalis, and incubated for 72 h. Roots were randomly divided into four experimental groups: PS only, LED only, aPDT with LED in the apical third, aPDT with LED in the coronal third, as well as into infection and sterile controls (each n = 10). Samples were taken by collecting standardized dentine shavings from the root canal walls. After serial dilution and culturing on blood agar, colony-forming units (CFU) were counted. Both aPDT groups showed a CFU reduction of 1-2 log(10) steps compared with the infection control, whereas the effect of fiber insertion depth was negligible (< 0.5 log(10) steps). CFU reduction of approximately 0.5 log(10) steps for PS alone was detected compared with the infection control, but PS alone was less effective than both aPDT groups. No antibacterial effect was detected for LED alone. aPDT reduced E. faecalis within the root canal, whereas fiber insertion depth had a negligible influence on antimicrobial effectiveness of aPDT. The insertion depth of the light-emitting diode may not influence the antibacterial efficacy of photodynamic therapy against E. faecalis in straight root canals."],["dc.identifier.doi","10.1007/s00784-016-1948-3"],["dc.identifier.isi","000402011500036"],["dc.identifier.pmid","27591860"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42428"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Springer"],["dc.publisher.place","Heidelberg"],["dc.relation.issn","1436-3771"],["dc.relation.issn","1432-6981"],["dc.title","Effect of fiber insertion depth on antibacterial efficacy of photodynamic therapy against Enterococcus faecalis in rootcanals"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","689"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Quintessence International"],["dc.bibliographiccitation.lastpage","697"],["dc.bibliographiccitation.volume","49"],["dc.contributor.author","Rödig, Tina"],["dc.contributor.author","Zimmermann, Felix"],["dc.contributor.author","Konietschke, Frank"],["dc.contributor.author","Sydow, Hans-Georg"],["dc.contributor.author","Wiegand, Annette"],["dc.date.accessioned","2020-05-22T09:34:34Z"],["dc.date.available","2020-05-22T09:34:34Z"],["dc.date.issued","2018"],["dc.description.abstract","Objective: This in-vitro study evaluated the antibacterial efficacy of sonic and ultrasonic irrigation with either intermittent or continuous flush in root canals infected with Enterococcus faecalis. Method and Materials: Seventy single-rooted, extracted teeth with straight root canals were prepared with FlexMaster NiTi-instruments, sterilized, inoculated with E faecalis and incubated for 72 hours. Sixty roots were randomly divided into four experimental groups as well as into infection and sterile controls (n = 10 each). The remaining teeth were used for SEM analysis of smear layer removal (n = 5) and infection with E faecalis (n = 5). Irrigation in the experimental groups was performed with 1% NaOCl and syringe irrigation, sonic activation of the irrigant with EndoActivator, ultrasonic activation with intermittent flush, or ultrasonic activation with continuous flush. Microbial sampling was performed by collecting dentin shavings from the root canal walls. Colony-forming units were counted and statistical analysis was performed using nonparametric rank-based ANOVA-type tests for longitudinal data (P < .05). Results: A significant reduction of E faecalis of 3 log10 steps compared to the infection control was achieved by all irrigation techniques (P < .0001). There were no significant differences in antibacterial efficacy between syringe irrigation, sonically, or ultrasonically activated irrigation (P > .45). Conclusion: Activation of 1% NaOCl with either sonic or ultrasonic devices did not increase the antimicrobial efficacy against E faecalis compared to conventional syringe irrigation in straight root canals."],["dc.identifier.doi","10.3290/j.qi.a40776"],["dc.identifier.pmid","30027169"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65708"],["dc.language.iso","en"],["dc.relation.eissn","1936-7163"],["dc.relation.orgunit","Poliklinik für Präventive Zahnmedizin, Parodontologie und Kariologie"],["dc.title","Comparison of the antibacterial efficacy of sonic- and two ultrasonic-activated irrigation techniques in reducing intracanal Enterococcus faecalis populations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]