So, I'm guessing that you are advocating complete extraction of all teeth because how else can you take care of this. All dentistry is a compromise. Does it do more good sometimes to do a crown than to not do it? You betcha! Now, that tooth will never be the same again even with the best crown in the world on it. You know what else gets bacteria? Everything! Hair, skin, fingernails, etc., and the best grooming habits will not get it all. That is where the immune system comes into play. We need to keep the bacteria levels as low as possible, so that the immune system does not become overwhelmed.