I have tested some low brush heads from a friend. It was as if the razor-sharp bristles abhobeln my gums. This model is much gum friendly. Now it is also the. With the softest bristles, but also the diamond Clean heads of Philips with hard bristles are recommended, because the bristles are rounded and thus not attack tooth enamel yet gums I for one will stay, despite the relatively high price on the original! Who has very sensitive gums, certainly can not go wrong with this brush. Recommended!