ITEM NAME:10PCS Delicate Whitening Rainbow Wood Toothbrush Bamboo Fibre Wooden Handle 3c.After normal wear and tear your bristles start to get worn out creating a less effective toothbrush. Clinical studies show that a worn out toothbrush removes less plaque than a new toothbrush. Your toothbrush builds up a large number of bacteria, so common sense practices also suggests to replace your toothbrush every 3 months.
