Improving performance of dental resins by adding titanium dioxide nanoparticles
| Autor: | Xinran Zhang, Jirun Sun, Peter M. Johnson, Wen-li Wu, Gary E. Schumacher, Aaron M. Forster, G.D. Quinn, Naomi Eidelman |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Dental Stress Analysis
Materials science chemistry.chemical_element Polyethylene Glycols chemistry.chemical_compound Polymethacrylic Acids stomatognathic system Hardness Elastic Modulus Materials Testing Spectroscopy Fourier Transform Infrared Bisphenol A-Glycidyl Methacrylate General Materials Science Composite material Pliability General Dentistry Elastic modulus Light-Curing of Dental Adhesives Acrylic acid Triethylene glycol Titanium technology industry and agriculture Nanoindentation Resin Cements Acrylates chemistry Mechanics of Materials Titanium dioxide Nanoparticles Adhesive Shear Strength Mass fraction |
| Zdroj: | Dental Materials. 27:972-982 |
| ISSN: | 0109-5641 |
| Popis: | Objective The objective of this study is to improve the performance of dental resins by adding a small amount of titanium dioxide nanoparticles (TiO 2 NPs), which have outstanding mechanical properties and unique photoactivities. Methods Acrylic acid modified TiO 2 NPs (AP25) were prepared and added to a mixture of bis-phenol-A-dimethacrylate and triethylene glycol dimethacrylate (mass ratio 1:1) at seven mass fractions. Disks made of these resins were subjected to FTIR microspectroscopy, nanoindentation, microindentation, and 3-point bending to determine the degree of vinyl conversion (DC) modulus and hardness. The shear bond strengths (SBS) of dentin adhesives containing various amount of AP25 were also examined. Results The DC increased as a function of mass fraction of AP25 and reached a plateau at 0.1%. The DC of the resin mixture was improved by ≈7% up to 91.7 ± 0.8%. The elastic modulus and hardness of the composites increased initially as more AP25 were added, and decreased after reached the maximum value at approximately 0.06% mass fraction of AP25. The maximum elastic modulus was ≈48% higher than that of the NP-free resin, and the maximum hardness was more than twice higher than that of the NP-free resin. Using these resin composites as dental adhesives, the mean SBS using resins with 0.1% mass fraction of AP25 was ≈30% higher than those using NP-free resin. Significance By adding a small amount of AP25 to the resin, the DC and the mechanical properties of resins were improved dramatically. These findings could lead to better performing dental adhesives. |
| Databáze: | OpenAIRE |
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