Use Silver Care 0.9mm interdental brushes are designed for effective cleaning of narrow gaps between teeth, removing plaque and food debris often missed by a regular toothbrush. They are ideal for people with normal or slightly narrow interdental spaces. Regular use of these brushes helps maintain gum health, prevent tooth decay and gum disease, and clean around dental structures such as braces, crowns, and bridges. How to take Gently insert the interdental brush straight into the gap between your teeth, without applying excessive force. Move the brush back and forth several times to remove plaque and food debris. Rinse the brush after each use. Replace the brush when the bristles wear out, or approximately after one week of use. It is recommended to consult a dentist or hygienist to determine the appropriate size of interdental brushes. Contraindications No explicit contraindications are indicated. However, do not apply excessive force when inserting the brush to avoid damage to gums or teeth.