This is one crazy story!

Charlie Sheen was reportedly accused of sexual assault by a dental technician who claimed the star got violent during a recent exam. The "Anger Management" actor is now being sued.

According to E! News, the dental tech, named Margarita Palestino, initially claimed that Sheen threatened one of the office's dentists with a knife after the tech was asked to administer nitrous oxide to the actor.

Sheen reportedly visited the Los Angeles dental office last Thursday in order to get treated for an abscess.

Sheen slammed the reports that he swung a knife at his dentist.

Additionally, the dentist denied that the event occurred, instead claiming that Palestino is lying about Sheen in an effort to seek fame.

"This is a ridiculous claim by an opportunist looking to make her 15 minutes of fame and my client is confident he will prevail in this absurd lawsuit," Charlie's lawyer, Marty Singer, told TMZ.

Now that Sheen has fought back against the dental tech's original claim, Palestino is now alleging that Sheen sexually assaulted her.

TMZ reports that the Palestino has filed a new lawsuit, saying that Sheen grabbed her left breast as she tried to put his nitrous oxide mask on. She also claims that the actor pulled at her scrubs and attempted to pull her bra strap down.

Palestino also alleges that, after Sheen ripped his mask off, he yelled, "I'm going to f***ing kill you!"

The tech claims that Sheen came to his appointment "incoherent" and eventually lunged at one of the dentists with a knife. According to Palestino, Sheen struck a dental chair with the knife, stabbing it repeatedly.

So is Palestino lying about the assault or does Sheen just really hate going to see the dentist? We're sure to here more on this case.