Benefits Specially designed with dental professionals to reach and clean areas which require special focus such as braces, implants and misaligned teeth Oral-B iO Specialized Clean is precisely shaped with angled outer tufts which support the central tuft, to reach and clean hard to reach areas iO Technology combines Oral-B's unique round brush heads with the Gentle micro-vibrations of iO toothbrush for Oral-B's best cleaning performance Oral-B iO brush heads are exclusively designed to fit Oral-B iO toothbrushes Dentists recommend changing brush head every 3 months to keep an optimal cleaning efficacy