No, you cannot fill your own cavity

Fixing a leaky faucet, changing your car's oil, haircuts- some things are better left to a professional.  Case in point, my co-worker told me she was in the toothpaste aisle at Walgreen's when she came across a product that is blatantly inappropriate to offer consumers.  There next to the dental floss and canker sore medication was Dentemp One Step, for repairing lost fillings and loose caps.  Not only does this company enable people to perform their own dental work for the low price of $5.99, but makes them believe this is actually a good idea with quotes like "Recommended by Dentists" and "You can eat on it!" sprawled across the packaging.  Directions include "remove as much of the old cement from the crown as possible"; I can just imagine someone laboring over their bathroom sink wondering why they didn't go to dental school- they're basically a pro!  Fast forward a few days when that pro work ends in a massive toothache and gaping hole in your mouth; guess the 8+ repair promise left a lot to be desired.