A wisdom tooth interproximal stick (or interdental brush) is a small, flexible cleaning tool designed to clean tight spaces between teeth, particularly around wisdom teeth and other hard-to-reach areas. It features a tiny brush head on a thin wire or stick, often with an angled or ergonomic handle for better access.

These sticks help remove plaque, food debris, and bacteria from gaps where regular toothbrushes can't reach, promoting gum health and preventing decay. They come in various sizes to fit different interdental spaces and are commonly used by people with braces, dental implants, or crowded teeth.