Except that, until proven otherwise, it is the hair that clean teeth, and hair, here, there are not many, apart around the perimeter of the crown of the brush. They are pretty hard, remain upright long, and it will not need to change brush. Sensitive, more flexible and provided, also wears out faster.
Well, the famous effect "polish" I have not seen.
Realistically, scaling the dentist, it is something else. The dentist heavily, much more than ever will a brush. Suffice to say that the polish because I have not seen the beginning of an effect, but since I went for a détartage my dentist (28 euros), then yes, I notice a difference!
In short, 3D White is great for those who have strong teeth, healthy gums and therefore do not fear a light brushing.
For those who have "bad teeth" for which hunting by scale (and therefore to caries) is a priority, I suggest Sensitive.
It will increase the replacement rate of brushes brushing but is more comprehensive.
