Subject: How do I measure tooth decay without an X-ray machine?

Hi, I currently plan on soaking several extracted teeth in various drinks, such 
as cola's, kool-aid, wine, and coffee. How would I measure tooth decay? I am 
assuming that they will become soft at some point but am not sure what is too 
soft or how exactly to measure it. Will I get different results is I renew the 
liquids each day as to just using the original soaking substance? Any 
information would be helpful. I will also be noting any discoloration as a side 
note.

Natalie Spence
A kindergartner who loves science experiments!

Re: How do I measure tooth decay without an X-ray machine?