Bacterial Viability and Physical Properties of Antibacterially Modified Experimental Dental Resin Composites |
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Authors: | Stefan Rüttermann Taina Trellenkamp Nora Bergmann Thomas Beikler Helmut Ritter Ralf Janda |
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Affiliation: | 1. Heinrich-Heine-University, Medical Faculty, Centre of Dentistry, Department of Operative Dentistry, Periodontology and Endodontics, Düsseldorf, Germany.; 2. Heinrich-Heine-University, Institute of Organic Chemistry and Macromolecular Chemistry, Düsseldorf, Germany.; University Hospital of the Albert-Ludwigs-University Freiburg, Germany, |
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Abstract: | PurposeTo investigate the antibacterial effect and the effect on the material properties of a novel delivery system with Irgasan as active agent and methacrylated polymerizable Irgasan when added to experimental dental resin composites.Materials and MethodsA delivery system based on novel polymeric hollow beads, loaded with Irgasan and methacrylated polymerizable Irgasan as active agents were used to manufacture three commonly formulated experimental resin composites. The non-modified resin was used as standard (ST). Material A contained the delivery system providing 4 % (m/m) Irgasan, material B contained 4 % (m/m) methacrylated Irgasan and material C 8 % (m/m) methacrylated Irgasan. Flexural strength (FS), flexural modulus (FM), water sorption (WS), solubility (SL), surface roughness Ra, polymerization shrinkage, contact angle Θ, total surface free energy γS and its apolar γSLW, polar γSAB, Lewis acid γS+and base γS- term as well as bacterial viability were determined. Significance was p < 0.05.ResultsThe materials A to C were not unacceptably influenced by the modifications and achieved the minimum values for FS, WS and SL as requested by EN ISO 4049 and did not differ from ST what was also found for Ra. Only A had lower FM than ST. Θ of A and C was higher and γSAB of A and B was lower than of ST. Materials A to C had higher γS+ than ST. The antibacterial effect of materials A to C was significantly increased when compared with ST meaning that significantly less vital cells were found.ConclusionDental resin composites with small quantities of a novel antibacterially doped delivery system or with an antibacterial monomer provided acceptable physical properties and good antibacterial effectiveness. The sorption material being part of the delivery system can be used as a vehicle for any other active agent. |
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