1 Add 1/2 cup sugar, the ginger, chicken broth, vinegar, soy sauce, sesame oil, and peanut oil; bring to a boil and cook for 3 minutes.  Dissolve 2 teaspoons of cornstarch into the water, and stir into the boiling sauce.
It is made of harmful microscopic bugs that use sugar to attack teeth. With time this creates a little hole in a tooth, and if not repaired with a filling, the cavity continues to grow. If a cavity is not treated it can destroy a good part of the tooth, making it hard to be rapaired with a conventional filling.
Once the pulp decays, you're on the road to tooth loss. Everyone around you may also find that your breath is pretty fierce. Ideally, though, you wouldn't let a cavity get to this point -- you'd see a dentist and take measures to prevent tooth loss. In that sense, you can stop a cavity from getting worse. However, some sources may suggest that you can treat a cavity through re-mineralization without a dentist's intervention.