Interdental toothbrushes are a complement for the toothbrush and the floss to achieve a total oral hygiene.  An interdental toothbrush can get through wider areas.  You must move it from the outside to the inside, rubbing the lateral sides of the teeth.

los cepillos interdentalesUse an interdental brush in wider cavities and in interdental areas.
los cepillos interdentalesUse an interdental brush in braces to remove any remains.