title: Filler particle size and composite resin classification systems.
abstract: The currently used composite resin classification systems need review if they are to continue to serve as descriptives and quantitative parameters denoting the filler particle content of these materials. Examination of the particles in 12 composite resins using a technique of washing the filler particles from the matrix of the composite resin was presented as yet another method of grouping composites according to filler particle content. Light microscopic examination of the filler particles that remained provided a separation of the 12 materials into four easily distinguished groups based on filler particle sizes. The wear of the 12 composite resins determined in a previous study was examined in relation to the classification of the materials by the currently available systems. The wear values were also examined using the groupings of the materials according to their filler particle sizes as determined by separating the particles from the matrix by the washing technique. Grouping composites on the basis of the filler particle sizes found after washing was easily correlated with wear and supported the suggestion that composites with smaller filler particles wear less.
authors: Department of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor 48109.
authors: B R
authors: BR
authors: Lang
authors: M
authors: M
authors: Jaarda
authors: R F
authors: RF
authors: Wang
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry* / Q000145:classification*; D003722:Dental Alloys / Q000737:chemistry; D017220:Dentin-Bonding Agents / Q000737:chemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003722:Dental Alloys; D017220:Dentin-Bonding Agents; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D019279:Resin Cements; C078905:Bisfil; C075052:Sinter Fil; C078906:Herculite Condensable; C048711:P-30 composite resin; D017438:Bisphenol A-Glycidyl Methacrylate; C036886:tytin; C067318:P10 dental resin; C059919:Estilux posterior; C069717:Viso-Fil; C046503:formula F 70