TEETH WHITENING EFFECT: Oral-B Radiant White Replacement Brush Heads combine perfect angle bristles with polishing petals to contact and polish all areas and remove surface stains for a brighter smile that shines. SPLAYED BRISTLES: The Oral-B replacement brush heads feature splayed bristles to signal when to change the brush head to maximise your clean. REPLACE EVERY 3 MONTHS: A worn-out brush head makes cleaning difficult, leaving bacterial plaque behind; for a superior clean, replace your brush head when the bristles are splayed. TRUSTED BY DENTISTS: Oral-B is the #1 Dentist-Recommended Toothbrush Brand Worldwide.