2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Nanocomposites for Restorative Dentistry

A. Uveges, K. Bukovinszki, M. Szaloki, C. Hegedus and J. Borbely
University of Debrecen, HU

Keywords:
nanocomposite, dental resin, shrinkage, tensile fracture

Abstract:
Dental filling materials are crosslinked resins with high abrasion resistance. Inorganic micro and recently nanofillers are introduced to improve their properties. However, the shrinkage of the resin component during the polymerization reaction is still a critical limitation of dental composite resins. Stresses from shrinkage can cause clinical problems such as postoperative pain, fracture of the tooth, and opening of restoration margins that can result in microleakages and recurrent carries. Many factors have a direct effect on the polymerization shrinkage of composite resin: curing methods (chemical or light-curing), placement techniques (incremental or bulk), cavity configuration and size of the restoration. The aim of this study was to examine the influence of modified resin using reactive polymeric nanoparticles on the physical properties of filling materials such as flexural modulus, flexural stress and polymerization shrinkage of different composites.

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