Superior plaque removal: well-angled brush head effectively but gently removes up to 100% more plaque along the gum line than a conventional manual toothbrush COLOUR CHANGING BRISTLES: The Oral-B brush heads feature colour changing bristles that signal when the brush head should be changed for maximum cleaning performance Replace every 3 months: a worn brush head makes cleaning difficult and leaves bacterial plaque behind. For superior cleaning, change brush head when bristles have faded to white For Oral-B iO handpieces: superior cleaning power with the single brush head designed - and guaranteed to fit - for the Oral-B iO electric toothbrush Dentist, inner confidence Oral-B: Oral-B is the No. 1 toothbrush brand, which is most commonly recommended by dentists worldwide