I am an ex dental nurse so hopefully I can put your mind at rest. Firstly, you are doing the right thing by making an appointment to have this broken tooth extracted. Waiting until you have severe pain and requiring the tooth extracted as an emergency is never a good idea. You have been booked in with a dentist who is used to dealing with nervous patients too so that's another plus. The removal will be under local anaesthetic but if you feel you will still be very nervous you could ask for sedation. This is a simple injection in the arm and puts you into a twilight sleep which means you are completely relaxed and it has an amnesiac effect so you won't remember anything about the procedure. This is available on the NHS but you need to arrange to have this before your appointment so that the dentist has everything ready and your appointment is long enough. If this has not been suggested to you by your dentist it could be that he does not think it will be required because he feels it will be a simple straightforward procedure. Most extractions are very quick and simple, and even if the tooth is badly broken down your dentist has the equipment to remove it simply and easily. The worst part for you will be having the local injection, most people dislike having this but dentists are doing g this every day and are very skilled at giving the injection painlessly so try not to worry too much. Once you have the tooth removed you will wonder why you were so worried about it! Good luck and best wishes.