The Philips Sonicare Optimal Plaque Control brush head features a concave trim profile specifically designed to target tooth-decaying plaque by hugging teeth and offering better conformity and surface-area coverage. Compatible with all click-on Sonicare models, these replacement brush heads remove up to 6x more plaque than a manual toothbrush. Use with a Philips Sonicare BrushSync compatible handle (DiamondClean Smart or ProtectiveClean) to unlock Smart features: BrushSync mode-pairing triggers