Interdental brushes are small, specialized tools used to clean the spaces between teeth and around dental work, where a standard toothbrush can't reach. They consist of a small brush head with bristles twisted around a central wire core and come in various sizes to fit different gaps. These reusable brushes are effective at removing plaque and food debris, making them useful for people with wider spaces between teeth, braces, implants, or limited dexterity.