Fracture resistance of anterior, posterior and universal light activated composite restoratives

This investigation measured the fracture resistance of a wide range of curr ently available light-activated-composite restoratives. Products intended s olely for anterior use were tested together with universal materials and pr oducts intended for posterior application. All materials were handled accor ding to manufacturers' instructions. For products evaluated in this investi gation, universal and posterior materials yielded higher mean torque to fra cture (T) values overall in comparison to the anterior products. One Microf illed and two Polyglas filled products designated for posterior application yielded relatively modest mean fracture resistance values.