I wouldn't do all that work on her teeth either (unless it was causing her some pain). Get a second opinion.
In the meantime, there are natural things you can do for teeth that really work well:
Toothpaste with Xylitol. The brand I use is called "Spry" but there are other brands. I buy it from my local health food store and also on-line. Xylitol is a natural Sugar that keeps bacteria from being able to take hold of a tooth. Xylitol also remineralizes teeth. Here's a link about xylitol: //www.curezone.org/forums/fm.asp?i=489362#i
Soladey Ionic Toothbrush. It uses some type of ionic action to keep the teeth clean. You can check it out at http://www.ener-chi.com
(scroll down and look to the left).
As far as foods go, try to feed you daughter a diet high in vegetables and whole grains. Make sure she drinks plenty of water too.
I follow much of what Andreas Moritz suggests about health. Here is a link to him answering a question about cavities: