title: Effect of filler type and polishing on the discoloration of composite resin artificial teeth.
abstract: In this study, the effects of filler type and polishing on the discoloration of composite resin artificial teeth were examined. Four types of experimental resins were prepared: one was a matrix resin, while the others were composite resins containing three different types of fillers (nano-sized silica filler with or without silanization, and prepolymerized filler). Specimens were immersed in distilled water, coffee, red wine, or curry. Color change after immersion was measured using a colorimeter. Color difference values (delta E) and changes in translucency parameter (delta TP) were statistically analyzed using three-way ANOVA and Tukey's comparison. On the influence of the polishing factor, statistically significant differences were neither observed in delta E nor delta TP between polished and non-polished tooth surfaces. On the contrary, the influences of filler type and discoloration medium, and their interaction thereof, were significant. With unsilanized filler, the delta E value of composite resin artificial teeth was significantly increased.
authors.affiliation: Complete Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan. imamu.ore@tmd.ac.jp
authors.forename: Soichiro
authors.initials: S
authors.lastname: Imamura
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Iwao
authors.initials: I
authors.lastname: Hayakawa
authors.forename: Paola G
authors.initials: PG
authors.lastname: Loyaga-Rendon
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Minakuchi
mesh_terms: D001585:Benzoyl Peroxide / Q000737:chemistry; D003069:Coffee; D003116:Color; D003124:Colorimetry; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods*; D006801:Humans; D008027:Light; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D017365:Spices; D013499:Surface Properties; D014093:Tooth, Artificial; D014867:Water / Q000737:chemistry; D014920:Wine
chemical_list: D003069:Coffee; D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D012821:Silanes; D014867:Water; C029824:urethane dimethacrylate luting resin; C020946:triethylene glycol dimethacrylate; C038017:neopentyl methacrylate; D011092:Polyethylene Glycols; D012822:Silicon Dioxide; C028643:trimethylolpropane trimethacrylate; D001585:Benzoyl Peroxide