This is not a legal matter...........................................

We have no idea. Ask your lawyer.....................

How you can be charged is irrelevant unfortunately. You were charged. So, now you have to defend yourself. To do that you need an attorney.

Can he sue? Yes. Will he? No Why? Because the cost would be more than he can recover.

Seriously? No they don't "go away."..............

Call the police..................................................

Can you get it dismissed? Unlikely, as you are not a lawyer and don't know how to proceed. Can a lawyer? Maybe, and the odds are significantly...

Think of it this way. Win or lose do you have the money to go up against Facebook and an army of lawyers?

Not really. You have no damages worth suing for.

Lawsuits are expensive and time consuming. Just use a different dentist/orthodontist.