| Seq #189 | Friday, 12 March 2004 | |||||||||||||||||||||||
| 8:00 AM-10:00 AM Hawaii Convention Center 316-A, Symposium - Group/Division Sponsored | ||||||||||||||||||||||||
| Demystifying Nanofillers for New Dental Composites | ||||||||||||||||||||||||
Sponsored by: Dental Materials | ||||||||||||||||||||||||
| Description: Polymer composite materials have existed almost since the beginning of the field of polymer science. It has long been understood that additions of fillers with physical dissimilarities in relation to a polymer matrix could yield materials with interesting and usually enhanced mechanical properties. These types of polymer-matrix composites have been a staple in the range of commercially available dental materials for several decades. Recently, the long anticipated ability to manipulate materials at the atomic scale has spawned the evolution of nano- and near-nano-sized fillers (with high aspect ratios) to create nano-composites with unique properties. Dental examples of nano-composites are just beginning to appear commercially (e.g., Supreme [3M-ESPE], Simile [Pentron]). These materials have different optical, mechanical, and chemical properties than the more traditional micron-scale composites. The objective of this symposium is to examine (A) the chemistry and properties of dental composites based on nano-filler technology and (B) to consider the potential for formulating further new nano-scale dental materials. At the moment, three major approaches to nano-fillers exist: (1) nanomers and nanoclusters derived from sol-gel fabrication approaches, (2) POSS (Polyhederal Oligomeric SilSesquioxane) systems, and (3) organo-metallic nano-complexes. Each offers different special advantages. In the near future these technologies will most likely be the basis of reformulating all dental materials (e.g., composites, glass ionomers, bonding systems, impression materials, etc.), many of which contain some sort of filler. This symposium provides an opportunity for current experts to present the fabrication methodologies of these systems, characterize their chemical characteristics, and explain their known effects on composite properties | ||||||||||||||||||||||||
| Chairperson: J. THOMPSON | ||||||||||||||||||||||||
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Back to the IADR/AADR/CADR 82nd General Session (March 10-13, 2004)