Interesting. I use Sensodyne for a completely unrelated reason: it does not contain Sodium Laurel Sulfate. I have not had a cavity in my entire life, and I'm over 45.
I mention that I like this toothpaste due to the lack of SLS - not for the cavities prevention. But I've not had any cavities, so that is another datum on top of the others who mention using this toothpaste and not having dental problems.