Antimicrobial Dental Material (IMAGE) University of Pennsylvania Caption Biofilms composed of Streptococcus mutans--a common cause of tooth decay--were much easier to remove when grown on a newly developed dental material (right image), which has an antimicrobial agent within it, compared to a control material. Credit University of Pennsylvania Usage Restrictions In context of reporting License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.