Yea, you should definitely inform the doctor abour your suboxone use. No matter what medication you are on, and no matter what surgery you are hvaing, you ALWAYS need to disclose all medication being taken to your doctor/surgeon.
First of all, you will be treated just like any other patient if you tell them....its not like they are going to refuse you surgery because you are on bupe. They are still capable of performing surgery but they just have to tweak there methods a little bit because you are a unique situation, but in fact, everyone is a unique situation and needs to have special decisions made about the procedure being performed on them.
The will more than likely just give you much stronger medications, or alot more quantity of the meds they were already gonna use. Either way, they CAN break through the bupe.
But, if you are worried about becoming addicted to pain meds again maybe you should ask your doctor if there is another alternative to having the surgery so that you dont have to end up using opiates. Chances are there is not, so you will more than likely still have the surgery. I would just reccommend that you make sure you have a support structure there for you that knows the situation you are in, so they/he/she can help keep you clean and prevent temptation from the opiates you were given. You can also call your bupe doctor/therapist/or drug counselor and get support in the way for a while until you feel that the risk of having the urge to relapse is insignificant.
Good Luck, I am having SEVERE back pain right now in fact because of muscle deteriation near my spine on my lower back.....im currently going to a chiropractor right now but I might end up hvaing to have surgery and maybe get opiate narcotic pain meds....which im trying to stay away from.