Synthesis of new dental nanocomposite with glass nanoparticles

Authors

School of Metallurgy and Materials Engineering , Iran University of Science and Technology (IUST), Tehran, Iran

10.7508/nmj.2014.02.007

Abstract

Objective(s):
The aim of this study was to synthesis new dental nanocomposites reinforced with fabricated glass nanoparticles and compare two methods for fabrication and investigate the effect of this filler on mechanical properties.

Materials and Methods: The glass nanoparticles were produced by wet milling process. The particle size and shape was achieved using PSA and SEM. Glass nanoparticles surface was modified with MPTMS silane. The composite was prepared by mixing these silane-treated nanoparticles with monomers. The resin composition was UDMA /TEGDMA (70/30 weight ratio). Three composites were developed with 5, 7.5 and 10 wt% glass fillers in each group. Two preparation methods were used, in dispersion in solvent method (group D) glass nanoparticles were sonically dispersed in acetone and the solution was added to resin, then acetone was evaporated. In non-dispersion in solvent method (group N) the glass nanoparticles were directly added to resin. Mechanical properties were investigated included flexural strength, flexural modulus and Vickers hardness.
Results:
Higher volume of glass nanoparticles improves mechanical properties of composite. Group D has batter mechanical properties than group N. Flexural strength of composite with 10%w filler of group D was 75Mpa against 59 Mpa of the composite with the same filler content of group N. The flexural modulus and hardness of group D is more than group N.
Conclusion:
It can be concluded that dispersion in solvent method is the best way to fabricate nanocomposites and glass nanoparticles is a significant filler to improve mechanical properties of dental nanocomposite.

Keywords


1. Bowen RL. Properties of a silica-reinforced polymer for dental restorations. J Am Dent Assoc. 1963; 66: 57-64.

2. Du M, Zheng Y. Modification of silica nanoparticles and their application in UDMA dental polymeric composites. Polym Composite. 2007; 28: 198-207.

3. Garoushi S, Vallittu PK, Watts DC, Lassila LVJ. Effect of nanofiller fractions and temperature on polymerization shrinkage on glass fiber reinforced filling material. Dent Mater. 2008; 24: 606-610.

4. Garoushi S, Vallittu PK, Lassila LVJ. Short glass fiber reinforced restorative composite resin with semi-inter penetrating polymer network matrix. Dent Mater. 2007; 23: 1356-1362.

5. Vitala A, Zürchera S, Dittmanna R, Trottmannb M, Lienemannb P, Bommera B, Graulea T, Apel E and Höland W. Ultrafine comminution of dental glass in a stirred media mill. Chem Eng Sci. 2008; 63: 484-494.

6. Tooley FV. The Handbook of Glass Manufacture. New York: Ashlee Publishing; 1984.

7. Mende S, Stenger F, Peukert W, Schwedes J. Mechanical production and stabilization of submicron particles in stirred media mills. Powder Technol. 2003; 132: 64-73.

8. Verwey EJ, Overbeek JTG. Theory of Stability of Lyophobic Colloids. New York: Dover Publications; 2000.

9. Wang H, Zhu M, Li Y, Zhan Q. Mechanical properties of dental resin composites by co-filling diatomite and nanosized silica particles. Mater Sci Eng. 2011; C 31: 600-605.

10. Widegren J, Bergstrom L. Electrostatic Stabilization of Ultrafine Titania in Ethanol. J Am Ceram Soc. 2002; 85: 523-528.

11. Adler JJ, Singh PK, Patist A, Rabinovich YL, Shah DO, Moudgil BM. Correlation of particulate dispersion stability with the strength of self-assembled surfactant films. Langmuir. 2000; 18: 7255-7262.

12. Moszner N, Salz U. New developments of polymeric dental composites. Prog Polym Sci. 2001; 26: 535-576.

13. Zandinejad AA, Atai M, Pahlevan A. The effect of ceramic and porous fillers on the mechanical properties of experimental dental composites. Dent Mater. 2006; 22: 382.