I worked part time for a dentist who did dental surgery (normal dental work in an outpatient surgery setting). For the most part, this was for developmentally disabled clients who would be unable to do work (even cleaning/exams) chairside. Ask about the possibility of having all work done in the hospital setting. I know that the pediatrician dentist in town also does surgery for some of his patients. It might take a lot of convincing to insurance to preauthorize but the dentist and even his regular doctor can help with that. A pre-op physical was required within 7 days of every surgery. It has to be within 7 days (don't ask if a physical done two weeks earlier will be o.k. - it will not - there are health issues that have to be addressed within 7 days) It may be different in your case, just to emphasis that whatever time lines you are given, it is very important to follow or ask in advance for an exception. Also NOOOOO food morning of - that is a biggy - we had to cancel so many surgeries because group homes did not follow this one.
Surgery is surgery with all its dangers - however, if that outweighs a scared difficult child who may at anytime call it off while in the chair, I would consider it. Once the dentist starts a procedure, it is best he can finish it.