The methods still being used in 2008 are ridiculous. This is a long time coming:
The next time your children get cavities, they might get tooth regeneration instead of fillings.
That’s because materials scientists are beginning to find just the right solutions of chemicals to rebuild decayed teeth, rather than merely patching their holes. Enamel and dentin, the materials that make teeth the strongest pieces of the body, would replace the gold or ceramic fillings that currently return teeth to working order.