There are zapper plans available on the net. I'm not sure of the web address If you can afford a Terminator 2 or a Silverado which I have, those are the tops. I believe a zapper would help your wife's tooth if it is infected. I have molar that looks half dead but I don't want a root canal because of all the bad thing I've heard about them. They open the door for more infections and more problems. If absolutely necessary I would get it pulled. Zapping and Colloidal Silver have spared me and my friend the loss of some of our teeth.