title: A clinical trial of four light-curing posterior composite resins: two-year report.
abstract: A 2-year study of the clinical performance of four posterior composite resins used for Class I and Class II restorations is reported. Seventy-seven obturations were reviewed from the patients selected for a previous 9-month study. Obturations were assessed macrophotographically and by scanning electron microscopic evaluation of marginal quality. The 2-year results were compared to those obtained at 9 months. The macrophotographic evaluation revealed a satisfactory clinical appearance in the majority of restorations. However, scanning electron micrographic observations demonstrated that moderate-to-medium marginal degradation occurred during the first 2 years of clinical service. Therefore the use of the products under investigation should be limited to selected cases in which esthetics is of primary concern.
authors.affiliation: Department of Preventive and Therapeutic Dentistry, University of Geneva, Faculty of Medicine, Switzerland.
authors.forename: D
authors.initials: D
authors.lastname: Dietschi
authors.forename: J
authors.initials: J
authors.lastname: Holz
mesh_terms: D000180:Acrylic Resins; D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D003763:Dental Leakage / Q000517:prevention & control; D003793:Dental Restoration, Permanent; D004955:Esthetics, Dental; D006801:Humans; D008963:Molar; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D011109:Polymethacrylic Acids; D011140:Polyurethanes; C048711:P-30 composite resin; D017438:Bisphenol A-Glycidyl Methacrylate; C059919:Estilux posterior; C046503:formula F 70