Oral-B Professional 3000 is designed to break up the plaque as it pulsates. Once the plaque is broken down the rotating of the brush sweeps it away. The manufacturers feel so strongly about their product they are offering a 60 day money back guarantee as well. It has 3 different modes for selecting the meet the needs and pressure sensor which will stop pulsing when you press to hard. It also has timer with 30 sec intervals to help you know how long you brush. That make the teeth clean without hurting the gum and teeth.