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659
Nanoparticle-reinforced resin-based dental composites.
Yang Xia1, Feimin Zhang, Haifeng Xie
1Institute of Stomatology, Nanjing Medical University, 136 HanZhong Road, Nanjing 210029, People's Republic of China.
Journal of Dentistry
|April 15, 2008
Summary
Surface modification of titanium dioxide (TiO2) nanoparticles with allyltriethoxysilane (ATES) significantly enhances the mechanical properties of dental resin-based composites. This improvement in microhardness and flexural strength is crucial for durable dental restorations.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Nanotechnology
Background:
- Dental resin-based composites (RBCs) are widely used restorative materials.
- Improving the mechanical properties of RBCs is essential for enhancing their longevity and performance.
- Titanium dioxide (TiO2) nanoparticles offer potential for reinforcing dental composites.
Purpose of the Study:
- To investigate the effect of surface modification of TiO2 nanoparticles using allyltriethoxysilane (ATES) on the mechanical properties of dental RBCs.
- To evaluate the dispersion and linkage of modified TiO2 nanoparticles within the resin matrix.
- To determine the optimal concentration of modified TiO2 nanoparticles for improved composite performance.
Main Methods:
- TiO2 nanoparticles were surface-modified with ATES via sonic dispersion in ethanol.
- Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) were used for nanoparticle characterization.
- Dental composite resin specimens were prepared with varying concentrations (0.5% and 1.0% by weight) of modified or unmodified TiO2 nanoparticles, alongside a control group.
- Microhardness and flexural strength of the composite specimens were measured.
Main Results:
- FTIR analysis confirmed successful surface modification of TiO2 nanoparticles.
- TEM images revealed improved dispersion and smaller cluster sizes of modified TiO2 nanoparticles, leading to a homogeneous composite surface.
- Composite resins containing modified nano-TiO2 exhibited significantly enhanced microhardness and flexural strength compared to the control group (P<0.05).
- A concentration of 1.0 wt.% modified nano-TiO2 resulted in superior mechanical properties compared to 0.5 wt.%.
- The ATES modification improved particle dispersion and linkage within the resin matrix.
Conclusions:
- Surface modification of TiO2 nanoparticles with ATES is an effective strategy to improve their dispersion and integration into dental RBCs.
- The modified TiO2 nanoparticles significantly enhance the microhardness and flexural strength of dental RBCs.
- This approach holds promise for developing advanced dental restorative materials with superior mechanical performance.
