It still takes 2 minutes to clean your teeth, even with the highest end ultrasonic. That is because you have to go tooth by tooth getting all angles. Yes, it i

It still takes 2 minutes to clean your teeth, even with the highest end ultrasonic. That is because you have to go tooth by tooth getting all angles. Yes, it is impossible to clean your teeth as well with a normal brush in the same 2 minutes, but that doesn't mean that under 2 minutes of ultrasonic will suffice. Like just because an elevator moves twice as fast doesn't mean you can go from 2 elevators to 1 and still service all floors with the same standard.