Three-year clinical evaluation of a polyacid-modified resin composite (Dyract)

The aim of this study was to clinically evaluate a polyacid-modified resin composite (Dyract; Dentsply deTrey). Forty-one Dyract restorations were pla ced (36 in noncarious cervical cavities and five in anterior approximal cav ities), and assessed after three years. The retention rate was 97% for the cervical restorations; however, 16 restorations showed some degree of margi nal discoloration, sometimes severe. Color match and surface integrity were highly satisfactory throughout the trial. Dyract has now been superseded b y Dyract AP, and the manufacturers should consider recommending mandatory e namel etching.