Here's a story of a German dentist who decided to take matters into his own hands when his patient decided not to pay for her work. (This guy is what the locals would call "verrückt").
Basically, the lady's insurance wouldn't pay for two bridges and she decided it wasn't her obligation to pay for them. The Zahnartzt from Neu Ulm (I think I rode a train through there once) then breaks into her home, ties her to a chair, and reclaims the bridges.
From the article:
"The dentist is being investigated for assault for the way he forced open her mouth, and theft for taking the bridges," said Christian Owsinski a police spokesman.Personally, I think the theft charges should be dropped. Think about it - he payed a lab fee to have the bridges made so if they belong to anybody then they are his, so this might be more of an OJ Simpson-forcefully-reclaiming-my-stuff type situation.
I do feel that he should lose his license. You simply can't perform a dental procedure (such as removing a bridge) against the patient's will. That's one of the least ethical things a dentist can do.
The creepiest part? According to the victim, he did all of this without even saying a word.
UPDATE: Court decision here. Dentist found guilty of assault and fined 6000 Euros. Patient too traumatized to wear dentures.