My health has improved by leaps and bounds!!!! It is perfectly safe. I wouldn't recommend it if it didn't work. Google HealOzone and learn more about this new innovation. It is used in all countries where the government pays for the healthcare! It is a preventative measure and our government has no interest in prevention we just treat symptoms as they come along because that's where the money is. The simple truth is when it comes to a root canal infection, here in the US, treatment approach is very limited...pull it out & replace with bridge or implant, cost=$1500-$4000 or endodonic root canal therapy about $2000. I have had 3 ozone treatments so far and I have paid $300, that includes initial consultation, xrays & ozone treatment. Bill knows what he is doing and he has been in Dentistry since the 70s. He is very hip to the latest dental advances and not afraid to use them.
Here is some info on Bill from his website, he has since sold his Dental practice and is working on a part-time basis: