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Selbstadhäsive Komposite als Füllungs- und Reparaturmaterialien - In-vitro Studie zur Haftung auf Zahn- und Kompositoberflächen

dc.contributor.advisorWiegand, Annette Prof. Dr.
dc.contributor.authorPeterson, Jana Karen
dc.titleSelbstadhäsive Komposite als Füllungs- und Reparaturmaterialien - In-vitro Studie zur Haftung auf Zahn- und Kompositoberflächende
dc.title.translatedSelf-adhesive composites as filling- and repair materials - in-vitro study on bonding on tooth- and composite surfacesde
dc.contributor.refereeRödiger, Matthias Pd Dr.
dc.description.abstractengAim: The aim of this in-vitro study was to analyse the bonding performances of self-adhesive flowable composites on enamel, dentin, and a nano-hybrid composite. Material and methods: Three self-adhesive composites (Constic, DMG Germany; Fusio Liquid Dentin, Pentron Clinical USA; Vertise Flow, Kerr Dental Italy) were tested on enamel and dentin surfaces. As a reference the conventional composite Venus Diamond Flow (Heraeus Kulzer Germany) was used. The conventional composite was tested in combination with an adhesive (Optibond FL, Kerr Dental Italy) in etch&rinse technique. After thermal cycling (5000 cycles, 5-55°C) shear bond strength was measured and failure modes were assessed in all subgroups (each n = 16). To analyse repair bond strength, nano-hybrid composite specimens were prepared and aged by thermal cycling (5000 cycles, 5-55°C). The surfaces were treated with Al2O3 air abrasion, mechanical roughening, silica coating/silanization or were left untreated. Before the respective composites were applied, an adhesive (Optibond FL, Kerr Dental Italy) was applied in half of the groups. All nano-hybrid composite specimens then underwent a second thermal cycling procedure (5000 cycles, 5-55°C). Shear bond strengths and failure modes were analysed for all specimens (each subgroup n = 16). Statistical analysis was provided by ANOVAs/Bonferroni post hoc tests, Weibull statistics and χ 2-tests (p < 0.05). Results: The self-adhesive composites reached significantly lower shear bond strengths on enamel (< 5 MPa) and dentin (< 3 MPa) than the conventional composite (enamel: 13.0 ± 5.1 MPa, dentin: 11.2 ± 6.3 MPa). Cohesive failures could only be observed in the reference group. Repair bond strengths were significantly related to the mechanical surface treatment (silica coating / silanization > mechanical roughening = Al2O3 air abrasion > no treatment). Repair bond strength of the conventional composite was increased by the application of Optibond FL, while the repair bond strengths of the self-adhesive composites were not improved by the application of the adhesive. The majority of cohesive failures occurred within the reference group. Conclusion: Bonding of self-adhesive flowable composites to enamel and dentin is low, they cannot be recommended as direct filling materials. Repair bond strengths on nano-hybrid composite are significantly higher, self-adhesive flowable composites therefore show potential as repair materials for composite restorations as far as the repair surface is small and limited to the composite
dc.contributor.coRefereeMeyer, Thomas Prof. Dr.
dc.subject.gerSelbstadhäsives Kompositde
dc.subject.engSelf-adhesive flowable compositede
dc.subject.engComposite repairde
dc.subject.engSelf-adhering compositede
dc.subject.engBond strengthde
dc.subject.engRepair restorationde
dc.affiliation.instituteMedizinische Fakultätde
dc.subject.gokfullMedizin (PPN619874732)de
dc.subject.gokfullZahn-, Mund- und Kieferheilkunde - Allgemein- und Gesamtdarstellungen (PPN619876360)de

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