title: Esthetic restorative materials and opposing enamel wear.
abstract: This in vitro study compared the effects of a gold alloy (Degulor M), four dental ceramics (IPS Empress, IPS Empress 2, Duceram Plus, Duceram LFC) and a laboratory-processed composite (Targis) on the wear of human enamel. The amount of wear of the enamel (dental cusps) and restorative materials (disks) were tested in water at 37 degrees C under standard load (20 N), with a chewing rate of 1.3 Hz and was determined after 150,000 and 300,000 cycles. Before the test, the average surface roughness of the restorative materials was analyzed using the Ra parameter. The results of this study indicate that Targis caused enamel wear similar to Degulor M and resulted in significantly less wear than all the ceramics tested. IPS Empress provoked the greatest amount of enamel wear and Degulor M caused less vertical dimension loss. Targis could be an appropriate alternative material to ceramic, because it is esthetic and produces opposing enamel wear comparable to gold alloy.
authors.affiliation: Departamento de Dentistica, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Anna Belsuzarri
authors.initials: AB
authors.lastname: Olivera
authors.forename: Márcia Martins
authors.initials: MM
authors.lastname: Marques
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D001732:Bite Force; D003188:Composite Resins / Q000737:chemistry; D003743:Dental Enamel / Q000473:pathology*; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent; D004955:Esthetics, Dental; D005899:Glass Ionomer Cements / Q000737:chemistry; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D018020:Lithium Compounds / Q000737:chemistry; D008409:Mastication / Q000502:physiology; D008422:Materials Testing; D012823:Silicate Cement / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D019217:Tooth Attrition / Q000209:etiology* / Q000473:pathology; D014867:Water / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D003188:Composite Resins; C452159:Degulor M; D003764:Dental Materials; C095718:Duceram; C118557:Empress 2; D005899:Glass Ionomer Cements; D006047:Gold Alloys; C075815:IPS-Empress ceramic; D018020:Lithium Compounds; C111282:dental polyglass; D014867:Water; D003776:Dental Porcelain; D012823:Silicate Cement