Plasma Brush (IMAGE) University of Missouri-Columbia Caption The plasma brush uses chemical reactions to disinfect and clean out cavities for fillings, in addition to forming a better bond for cavity fillings. Credit MU News Bureau Usage Restrictions None 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.