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Darth Vader, D.D.S., straightened to his full height and turned off the dental lamp. "You have a severe cavity almost at bone level. A repair of the tooth may be possible, but you would likely still need a root canal in the future. Instead, I am going to anesthetize you and perform an extraction."
"What?!" Lando Calrissian protested. "You can't do that without my consent!"
"You are restrained in my dental chair in my office filled with Imperial storm troopers; you will find I can do as I wish. More important, you failed to read the fine print in your patient contract that gives automatic consent for Imperial Dentistry to do anything necessary, extraordinary measures included, for your oral health."
"You told me when I first called that it sounded like all I needed was a filling. Removing my tooth wasn't part of our deal!"
Vader loomed over the restrained Calrissian. "I am altering the deal," he said sternly as he readied the anesthesia. "Pray I don't alter it any further."