چكيده به لاتين
In this research, with the aim of developing an advanced and biocompatible dental restorative material, a resin composite based on Bisphenol A-glycidyl methacrylate (Bis-GMA) and ethylene glycol dimethacrylate monomer (EGDMA) as The diluent agent was designed and synthesized. The use of this resin composition, while providing appropriate adhesion and viscosity, provides a suitable substrate for the dispersion of the filler phase. In order to enhance the physical, biological and Which has a light structure In this study, two types of filler were selected: pyrolyzed silica with the trade name Aerosil, which has a structure It has a high active surface area, and fluorohydroxyapatite, which has a structure similar to the mineral tissue of teeth and enhances biological and antibacterial performance. The composite paste obtained from these components was polymerized by two different methods: (1) light polymerization using a light-emitting diode (LED), which is a common method in dental clinics, and (2) a novel method of plasma polymerization under dielectric barrier discharge conditions (DBD Plasma), which leads to surface activation and more efficient polymerization without generating additional heat. To fully evaluate the structure and performance of the composites, numerous tests and analyses were conducted, including: • FT-IR analysis to examine chemical bonds and completion of the polymerization reaction; • XRD analysis to determine the crystalline phases of the fillers and the uniformity of the dispersion in the matrix; • FE-SEM and AFM to examine the surface morphology, uniformity and roughness; • EDX to identify the elemental composition and distribution of elements; • Mechanical (compressive) tests to measure the compressive strength of the composite; • Antibacterial test to evaluate the inhibitory effect of the growth of pathogenic bacteria in the oral environment. Experimental results showed that the combination of Aerosil and fluorohydroxyapatite significantly improved the mechanical properties, strength, durability, and biocompatibility of the composite. Also, the plasma method provided advantages over light polymerization such as stronger surface bonds, increased polymer network density, reduced surface roughness, and more uniform distribution of the filler phase.
