The complaint was filed on Friday at the Los Angeles County Superior court by the attorneys of Margarita Palestino, reported Ace Showbiz.
The dental office technician also claims that her employer, dentist George Bogen, told her that Sheen "was 'high' on a combination of crack cocaine, Theradol, and alcohol" during the incident.
The complaint alleges that on September 25, the television star had an appointment at the office of Bogen, and that Sheen was accompanied by a bodyguard and personal assistant.
He then "ripped off the mask and jumped out of the chair, causing the dental instruments to fall to the floor" and threatened to kill Palestino before attacking her.
"As a direct and legal cause of (Sheen's) wrongful and intentional conduct, (Palestino) suffered and continues to suffer physical injury, pain and suffering and mental anguish," the complaint claims.
Sheen's attorney Marty Singer has called the lawsuit "ridiculous and fictional" and filed by "an opportunist who is looking for her 15 minutes of fame".