The funnyman had a temporary triple crown put in his mouth, but is returning to his specialist next week (begs23Jan12) to have a permanent replacement fitted.
In a post on his Twitter.com page on Friday morning, he writes, "Hell's teeth & a bucket of blood. 3 hour session at the dentist coming up. There isn't enough (anti-anxiety drug) Xanax in the world to prepare for this."
And updating fans later on in the day, he added: "Well that went better than expected. Temporary triple crown fitted on bottom row. Real ones installed next week. Actually fell asleep."
Fry wasn't the only star who visited a dentist on Friday - actress Kirstie Alley also had an appointment with her specialist to undergo root canal surgery.