Designed for regular hygienic oral care. The brush heads provide additional mechanical action while rinsing the teeth with a stream of water. The bristles on the attachments are motionless. The brush heads can be used with or without toothpaste. Provide additional care for crowns, bridges and fixed dentures. Do not replace your regular toothbrush. The manufacturer recommends changing the brush heads every three months. Compatible with Revyline RL 100/300/400/500/600/700 irrigators.