I had already tested and many toothbrushes, bristles automatic gear etc. The Elmex C 200 I had actually bought as Reisezahnbuerste order to dispose of after 6 weeks in the 3rd world back there. When I tried them for the first time, I was satisfied. After days of use, I was more than impressed. So gentle and pleasant dental cleaning I had never experienced. The gums are not irritated and bleeding gums has disappeared over time. It is a pleasant and clean feeling in Mund.Ich can really recommend. Who has this patent devised would have to be proposed for the Nobel Prize. Of course, they come back with me to Germany.