The Oral-B TriZone toothbrush head is made to deliver the superior results of a power toothbrush but helps you brush as you would with a manual brush for easy handling. The Oral-B Tri-Zone Toothbrush Heads are designed with dynamic angle power tips that allow hard to reach areas like the back of the teeth to be reached while cleaning. Non-sweeping bristles pulsate on the entire surface of the teeth to fight plaque build-up and reach between teeth for a stimulating brushing experience. The design of the toothbrush heads imitate that of a manual brush.