title: Wear model simulating clinical abrasion on composite filling materials.
abstract: The aim of this study was to establish a wear model for testing composite filling materials with abrasion properties closer to a clinical situation. In addition, the model was used to evaluate the effect of filler volume and particle size on surface roughness and wear resistance. Each incisor tooth was prepared with nine identical standardized cavities with respect to depth, diameter, and angle. Generic composite of 3 different filler volumes and 3 different particle sizes held together with the same resin were randomly filled in respective cavities. A multidirectional wet-grinder with molar cusps as antagonist wore the surface of the incisors containing the composite fillings in a bath of human saliva at a constant temperature of 37°C. The present study suggests that the most wear resistant filling materials should consist of medium filling content (75%) and that particles size is not as critical as earlier reported.
authors.affiliation: Department for Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109 Blindern, NO-0317 OSLO, Norway.
authors.forename: Gaute Floer
authors.initials: GF
authors.lastname: Johnsen
authors.forename: Sébastien F
authors.initials: SF
authors.lastname: Taxt-Lamolle
authors.forename: Håvard J
authors.initials: HJ
authors.lastname: Haugen
mesh_terms: D000098:Acetophenones / Q000737:chemistry; D000134:Acid Etching, Dental; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000145:classification; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent; D006801:Humans; D007180:Incisor; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D010756:Phosphoric Acids / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D058105:Polymerization; D011109:Polymethacrylic Acids / Q000737:chemistry; D012463:Saliva / Q000502:physiology; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature; D014072:Tooth Abrasion / Q000503:physiopathology; D055114:X-Ray Microtomography; D015040:Zirconium / Q000737:chemistry
chemical_list: D000098:Acetophenones; D003188:Composite Resins; D003764:Dental Materials; D010756:Phosphoric Acids; D011109:Polymethacrylic Acids; D012821:Silanes; C083568:Z100 composite resin; C020946:triethylene glycol dimethacrylate; C452198:2,2-dimethoxy-2-phenylacetophenone; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide; D015040:Zirconium; C030242:phosphoric acid