RADIUS was founded on the Caribbean island of Tortola, later the founders moved to the United States. RADIUS takes a unified approach to designing toothbrushes that work better than regular toothbrushes. Thin bristles go far into the space between the gum and the tooth, preventing the development of inflammation and the formation of tartar. Bristles up to 6500. Longer service life - up to 9 months. A wide brush head brushes teeth and gums at the same time. Gum massage prevents bleeding and sagging. Angled bristles — right-left-hand grip configuration provides 45 ° automatic tilt relative to teeth — as recommended by the American Dental Association. A large handle prevents overpressure caused by too strong and non-slip grip of the toothbrush handle.