The oral b pro sensitive clean replacement electric toothbrush heads feature extra soft bristles that are gentle on gums, combined with regular bristles that are tough on plaque. It removes up to 100% more plaque and reduces gum inflammation by 100% compared to a manual toothbrush. Oral b genuine brush heads are designed with new x shape bristles that clean in areas that round ones cannot reach. Removes up to 100% more bacterial plaque for cleaner teeth and healthier gums vs. A manual toothbrush only genuine oral b brush heads feature x shape bristles that clean in areas that regular ones cannot reach for optimal cleaning efficacy oral b sensitive clean features a high density of extra soft bristles for a gentle and effective clean guaranteed fit with oral b electric rechargeable toothbrushes except for pulsonic and io toothbrushes.