Narnia - think of the visit to the dentist in a different way - instead of the fear/pain you expect to experience, consider this from the dentist's viewpoint. S/he will have allocated something like an hour for the extraction (it will only take five minutes but there'll be the cleaning of the room before and after and of course that's all in the price you pay). So if you can quantify the time you believe you'll be terrified for, you can then begin to compare that with other events in your life when you've been very apprehensive - childbirth maybe if you've had children. As your lead up before visiting the dentist, try to do some breathwork, focus on your breathing, count the breaths in through your nose (4), hold the breath for another count of 2, breathe out through your mouth for a count of 6 or more and concentrate on that out breath so that you really feel the movement inside. If you can master this technique your extraction will be done before you know it and as others have said, the dentist will be aware of your anxiety and be sympathetic - you really are the customer if you're paying and by the way, £600 is cheap for a private extraction so use that as the basis for a glass half full approach. Wishing you courage.