I had just started taking it when a visit to the dentist revealed two cavities.
I immediately went and had the worst one done and then an appointment for the second was set up.
Before the appointment date I discovered that the tooth had healed up.
That was a year ago and my dentist is still asking when I'll be in to get the other tooth done even though on inspection my hygienist can't find any trace of the decay.
This product will kill bacteria inside of bones and obviously teeth also, according to my experience.
The reason for it has to do with the vibration that is mentioned on the page there.
The water vibrates at a vibration that is higher then bacteria can survive at.