Positively removes plaque! Silent ionic action makes teeth repel plaque! Clinically proven to improve health of gums! For cleaner, whiter teeth. If allowed to build up, plaque can lead to cavities, gum problems and may cause bad breath. Before: Everything in nature has a charge or polarity. Opposite polarity makes plaque (+) adhere to teeth (-). After: hyG temporarily reverses polarity of tooth surfaces from (-) to (+). The hyG Ionic Toothbrush from Dr. Tung's is clinically proven to remove plaque and improve gingival health. Power Source handle guaranteed for One Year. Patented Worldwide. hyG Ionic System Includes: Power Source Handle with Battery Tester; Three Interchangeable Brush Heads. Great for braces. Ionic action helps remove plaque in hard to reach areas. Designed to break the electrostatic bond between plaque and teeth. Up to 48% more effective than regular toothbrushes! Manufactured in Japan by Hukuba Dental Corp.