I'm not sure Jinx. I don't think it's quite the same as a jawbone infection, which is like a pocket inside the jawbone which collects potent gram negative bacteria and basically it sits in there like rotting decay (gangrene)....

Whereas a cavity in your tooth itself? Hmmm, I don't know. I do not think it's quite like a hidden jawbone cavitation/pocket. You'll be exposing more of the tooth of course, and the nerve/pulp maybe affected. But I'm not a dentist, so I couldn't tell you how safe it is or not.