title: 2-year clinical evaluation of Class I posterior composites.
abstract: OBJECTIVE
  To clinically evaluate different brands of resin composites in Class I restorations.
  
  
  METHODS
  A total of 120 Class I cavities were prepared in permanent molars and restored with four posterior resin composites: Clearfil Photo Posterior, Z100, Herculite XR, and Heliomolar RO. The restorations were evaluated at baseline, 1 and 2 years using the USPHS criteria.
  
  
  RESULTS
  After 1 year, Z100 restorations were rated Alfa in all tested criteria. Clearfil PP, Herculite XR and Heliomolar RO showed slight changes in color match, anatomic form, and marginal adaptation. After 2 years, no significant difference was found in the evaluation of cavosurface discoloration for all tested materials. Z100 and Herculite XR were significantly more color stable than Clearfil PP and Heliomolar RO. The anatomic form evaluation showed Z100 with a significantly higher value than other groups. Heliomolar RO revealed the lowest percentage of marginal adaptation.
authors.affiliation: Dept. of Restorative Dentistry, Faculty of Dentistry, University of Tanta, Egypt.
authors.forename: A I
authors.initials: AI
authors.lastname: Abdalla
authors.forename: H A
authors.initials: HA
authors.lastname: Alhadainy
mesh_terms: D000179:Acrylates; D000180:Acrylic Resins; D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate; D016009:Chi-Square Distribution; D003116:Color; D003188:Composite Resins; D018772:Dental Marginal Adaptation; D019554:Dental Restoration Wear; D017220:Dentin-Bonding Agents; D005500:Follow-Up Studies; D006801:Humans; D008689:Methacrylates; D008875:Middle Aged; D008963:Molar; D011140:Polyurethanes; D019279:Resin Cements; D012822:Silicon Dioxide; D015040:Zirconium
chemical_list: D000179:Acrylates; D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C513708:Heliomolar; D008689:Methacrylates; C088316:Optibond Dual Cure; D011140:Polyurethanes; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C083568:Z100 composite resin; C065770:Herculite XR; C074669:Clearfil Photo Bond; C092420:Clearfil Photo Posterior; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide; C040415:heliobond; D015040:Zirconium