The Bi-Direction Proxabrush interdental brushes by Gum allow you to clean interdental spaces, whether tight or not. They remove plaque up to 25% more effectively than una conventional bristles. Additionally, their bristles are coated with Chlorhexidine for antiseptic action. Interdental brushes are essential for cleaning the back of the mouth. They can be used by wearers of bridges, orthodontic appliances, or implants.