I rarely use either one and have perfectly healthy teeth and gums. I believe in cleaning from the inside rather than the outside. A diet, like one rich in fruits and veggies, that rids the body of toxins and supplies nutrients to your gums and teeth so they can fight off disease all on their own.
Thoughts on Programming, Number 13: In some terminal systems ... the user can keep his program from being pushed down in the priority stack by fiddling with the shift key while he is thinking. -The Psychology of Computer Programming, Gerald M. Weinberg