I had a L4 fusion back in January and still am having pain. I can't sit for long without extreme pain going down my right leg. My OS suggested i go back for surgery to insert (what he calls) a U. He explained its a tiny like bracket behind the screw to give me more mobility there. He says, due to a birth defect on my L5 there wasn't enough bone to hold the screw. So, he wants to do surgery again to insert the U. Have any of you had an experience like this?
any help would be great.