title: Occlusal wear of provisional implant-supported restorations.
abstract: BACKGROUND
  Implant-supported provisional restorations should be resistant to occlusal wear.
  
  
  OBJECTIVE
  The purpose of this laboratory study was to evaluate three-body wear of three indirect laboratory composite resins, five chair side bis-acryl resin-based materials, and two chair side methacrylate-based materials used to fabricate provisional implant-supported restorations.
  
  
  METHODS
  The materials were handled and cured according to the manufacturers' instructions. The three-body wear was measured 1 day, 3 days, 7 days, 4 weeks, and 8 weeks after curing using the ACTA wear device.
  
  
  RESULTS
  Wear rate decreased significantly after 8 weeks compared with the first day for all tested materials, except for Estenia C&B. The three-body wear of two indirect laboratory composite resins, that is, Estenia C&B and Solidex, was significantly less compared with all other tested materials used for fabricating provisional implant-supported restorations. Of the chair side materials, the wear rate of Protemp Crown Paste was significantly less compared with the others materials used to fabricate chair side provisional implant-supported restorations. The methacrylate-based materials, Temdent Classic and Trim, showed extreme high wear rates.
  
  
  CONCLUSIONS
  Based on the results of this laboratory study on long-term wear, the use of indirect composite resin is preferred over chair side methacrylate-based materials when the provisional implant-supported restoration has to be in service for a long period of time. Of the investigated materials, only Estenia C&B and Solidex showed wear rate comparable with posterior resin composites.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
authors.forename: Hendrik J
authors.initials: HJ
authors.lastname: Santing
authors.forename: Cornelis J
authors.initials: CJ
authors.lastname: Kleverlaan
authors.forename: Arie
authors.initials: A
authors.lastname: Werner
authors.forename: Albert J
authors.initials: AJ
authors.lastname: Feilzer
authors.forename: Gerry M
authors.initials: GM
authors.lastname: Raghoebar
authors.forename: Henny J A
authors.initials: HJ
authors.lastname: Meijer
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003794:Dental Restoration, Temporary; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; C477352:Sinfony composite resin; C113676:Solidex; C448321:integrity resin; C098586:luxatemp; C091839:urethanetrimethacrylate; C091347:vinyl ethyl methacrylate; D017438:Bisphenol A-Glycidyl Methacrylate; C069714:Protemp
keywords: composite resin; dental implants; dental materials; provisional restoration; wear