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The Effect of Adding Chitosan Nanoparticles on Different Properties of the Adhesive and High-Filled Composite Resin Publisher



Masoumi M1 ; Valizadeh S2, 3 ; Carvalho RM4 ; Akbari Moghaddam A1 ; Ghodsi S2
Authors
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Authors Affiliations
  1. 1. Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Dental Research Center, Dentistry Research Institute, Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, BC, Canada
  4. 4. Head Dept. of Oral Biological and Medical Sciences, Professor of Biomaterials, University of British Columbia, Faculty of Dentistry, Vancouver, BC, Canada

Source: International Journal of Adhesion and Adhesives Published:2024


Abstract

Purpose: To evaluate the effect of adding nano-chitosan on different properties of the adhesive and high-filled flowable composite resin (viewing the graphical abstract is suggested). Background: Incorporating chitosan might improve the quality of adhesive and high-filled composite resin used in the deep margin elevation (DME) and other restorative methods. Materials and methods: Two groups of composite disks (without chitosan, with 1 % chitosan) were created to evaluate antimicrobial effects, degree of conversion (DC), solubility and water sorption. Antimicrobial activity was evaluated through biofilm inhibition and disk agar diffusion tests while DC was analyzed using FTIR. For the microshear bond strength test (μSBS), extracted maxillary molars were sectioned 1 mm under the CEJ, undergoing immediate dentin sealing and DME in four groups: control, pretreatment chitosan application, adhesive+1 % chitosan, and composite+1 % chitosan. The forces and the modes of failure were recorded. Results: Adding chitosan nanoparticles increased the antimicrobial activity, significantly (p < 0.05). The μSBS and DC did not differ significantly between the groups (p > 0.05), and the failures were mostly found in the adhesive mode. The solubility and water sorption increased significantly (p < 0.05), remaining in a clinically acceptable range though. Conclusion: Adding chitosan could be a potential option to increase the antibacterial effect in the high-filled composite resin without any negative affect on μSBS or DC, and clinically unacceptable effect on solubility and water sorption. (The graphical abstract has been provided). Clinical significance: Adding chitosan nanoparticles to high-filled flowable composite resin, increases the success rate of related restorative technique by adding the antimicrobial effect without any significant negative influence on other biomechanical properties. © 2024 Elsevier Ltd
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