There is absolutely no question that the case has merit.
The question is, how did the cafeteria operators respond to any complaint they may have recieved?
Beyond the cost of getting his teeth fixed, there is the issue of the pain he suffered. I am sure it must have hurt like a mofo. I would consider it an additional grievance if the operators just figured to pay the dental bill and say "Stuff happens, let's move on." They go on with their business and Kucinich has to live with the memory of a meal gone horribly wrong.
Excuse me, but I have always felt that if you cause someone to suffer pain or hardship in your pursuit of profit, you owe the victim some recompense. You have no intrinsic right to serve an unsafe food. You have a right to expect that the food you purchase is safe.
If you commit a tortious act, you need to be prepared to pay a penalty as well as just fixing what went wrong. It keeps people a little more honest to have to worry about that sort of thing.