title: Three-year clinical evaluation of a polyacid-modified resin composite (Dyract).
abstract: The aim of this study was to clinically evaluate a polyacid-modified resin composite (Dyract; Dentsply deTrey). Forty-one Dyract restorations were placed (36 in noncarious cervical cavities and five in anterior approximal cavities), and assessed after three years. The retention rate was 97% for the cervical restorations; however, 16 restorations showed some degree of marginal discoloration, sometimes severe. Color match and surface integrity were highly satisfactory throughout the trial. Dyract has now been superseded by Dyract AP, and the manufacturers should consider recommending mandatory enamel etching.
authors.affiliation: School of Dental Science, University of Melbourne, Faculty of Medicine, Dentistry, and Health Sciences, 711 Elizabeth Street, Melbourne 3000 Australia.
authors.forename: M J
authors.initials: MJ
authors.lastname: Tyas
mesh_terms: D000134:Acid Etching, Dental; D000368:Aged; D003116:Color; D020770:Compomers / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure; D003793:Dental Restoration, Permanent; D005500:Follow-Up Studies; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D008875:Middle Aged; D017640:Silicates / Q000737:chemistry; D013223:Statistics as Topic; D013499:Surface Properties; D019237:Tooth Cervix / Q000473:pathology; D014076:Tooth Diseases / Q000628:therapy
chemical_list: D020770:Compomers; C088486:Dyract; D008689:Methacrylates; D017640:Silicates