TEPE Interdental Brushes: A product designed to prevent gum disease and tooth decay. Interdental brushes are also used to clean implants and orthodontic appliances. How to use: Cleaning between the front teeth: Use the straight interdental brush between the front teeth. Insert it gently and do not force it; work gently or choose a smaller size. Move the brush back and forth along its entire length a few times. Cleaning between the back teeth: If you use a smaller interdental brush