Iranian scientists produce new type of light-cured dental nanocomposites

Iranian researchers synthesized a new type of dental nanocomposite to be used in recovery dentistry and filling of anterior teeth. The use of argon laser to cure these materials and selecting specific wavelength are the specifications of this method in comparison with usual radiation systems. These characteristics enable the composite to reach the desirable conversion level and cure depth with lower intensity, and they reduce the damage to the tooth pulp due to the shorter curing time and lower heat. Seyed Shahaboddin Mir-Sa’sa’ani, from Amir Kabir University of Technology, elaborated on the research. “The production of dental nanocomposite to be used in recovery dentistry and filling of anterior teeth was among the objectives we followed in this research. In this research, the effect of various intensities of argon laser and various concentrations of filler on water adsorption and solubility of the samples was investigated too,” he said. According to Mir-Sa’sa’ani, the use of SiO2 nanoparticles with initial size of 10 nm and the use of argon laser to cure the composite instead of using common systems such as halogen lamps is among the unique characteristics of this system, to the extent that the plan to produce dental nanocomposite based on (Bis-GMA + TEGDMA + SiO2) cured by argon laser has been granted in Iran Patenting Organization (IRIPO). The use of nanoparticles in the structure of nanocomposites modifies the surface polish and bending strength of the composites in comparison with the samples containing fillers at micrometric scales.