What Is A Radius Toothbrush?Beauty by Mrs C - August 23, 2011I have just started using a Radius Toothbrush and am reserving judgement properly until I've been using it for a few months.Radius claim that their toothbrushes last for up to 9 months which is loads longer than ordinary toothbrushes. Apparently their bristles don't absorb water and this means they last longer. Well, we'll see!I am rubbish with toothbrushes and am forever having to buy