The Oral-B iO ultimate cleaning replacement brush head removes up to 100% more plaque than a conventional manual toothbrush, providing the best cleaning from Oral-B. The revolutionary magnetic technology of the iO toothbrush delivers energy precisely to the tips of the bristles. The twisted bristles adapt perfectly to each tooth, while the bristle-in-bristle bundles reach deep into the gaps between teeth. The iO replacement brush heads are only compatible with Oral-B iO electric toothbrushes. Swiss dental hygienists trust Oral-B iO.