The Oral-B iO Interdental Cleaning Brushes feature an innovative bristle pattern developed in collaboration with dental professionals that provides high bristle density in a concentrated design to effectively clean hard-to-reach areas. Precisely shaped outer bristles support the centre bristles to clean hard-to-reach areas such as braces, dental implants or other high maintenance areas. Ideal for people with special oral hygiene needs who want to avoid plaque-related complications. The interdental cleaning brush heads are designed exclusively for Oral-B iO electric toothbrushes. As dentists recommend changing the brush head every 3 months, the Oral-B brush heads have bristles that signal when it's time for a change. Superior cleaning power with the only brush heads designed exclusively for the Oral-B iO electric toothbrush.