Is sedation with versed, fentanyl and decadron really efective. i have extreme fobia of anything dentist related (pass out, cry, tachicardia,etc) and will get wisdom and premolars out. should it work or will i be uncooperative and terrified?

You will be asleep throughout the entire procedure.

I assume from your question tghatn the extractions will be carried out by7 a specialist Oral Surgeon. That's 4 years of Dental School (10,000 hours) training after college followed by 5 years (12,500 hours) Residency training and a lifetime of honing his/her skills. After evaluating your medical history and physiology the Surgeon has prescribed the medication that will serve you best.