@grseme
Unfortunately the odds are pretty good that if you do have permanent damage to your internal sphincter (the one that is at the bladder neck), then you will have some degree of incontinence. I don't believe there is any surgical procedure to repair this sphincter, at least as far as eliminating incontinence. It could be that your surgeon didn't damage the sphincter as much as he removed part of it to make sure he got all the cancer. Unless he did a video of the surgery I would think it hard to get an award for damages, as who's to say exactly how much of your prostate & surrounding tissue had to be removed to get all the cancer?