Did Charlie Sheen really pull a knife on his dentist? According to the always controversial actor’s attorney and publicist, this latest story couldn’t be further from the truth. TMZ first reported that Sheen was at a medical office last Thursday for an abscess, when he flipped out and went after his dentist shortly after a dental technician placed a mask over his face to administer nitrous oxide. Marty Singer, Sheen’s lawyer, told E! News in a statement that the story is “completely false”.