The patented Sonicare sonic technology removes up to twice as much plaque as a manual toothbrush. It enables a more thorough removal of plaque and makes the back molars easier to reach. Brushing twice a day with this brush can help reduce cavities. The advanced Philips Sonicare sonic technology flushes water between the teeth and dislodges and removes plaque with its brushing movements for an exceptional daily cleaning result.