Wisdom Interdental Brushes are the most effective way to remove plaque and clean the larger interdental spaces between teeth, they are also ideal for cleaning around bridgework and orthodontic appliances. Wisdom Interdental brushes are available in three sizes (0.45mm, 0.6mm and NOW available in 0.7mm) to make sure you can find the perfect product for you. Product features...Designed to clean between the teeth and around bridgework and orthodontic appliances. Removes the plaque from spaces between the teeth to help prevent gum disease and tooth decay.