The radius scuba toothbrush is american dental association accepted for prevention of gingivitis and removal of plaque the scuba has an ergonomically designed handle that is available in right or left hand for accurate and improved brushing made from recycled rubber to give a flex neck to reduce and alleviate pressure from hard brushers to feel truly clean you dont need a toothbursh you need a mouthbrush bristles last 9 months wide massaging head helps reduce chronic ble