Welcome to the forum... sorry that you have the need to be here.
Doesn't nucleus replacement require a mostly intact annulus. With the herniation, surgery and new problems are you even a candidate? If you are being told you are a candidate, are you a great candidate or a marginal candidate?
There is a ton of information in the publications you'll fine on
http://www.nucleusarthroplasty.com/. If you have trouble viewing or would prefer, I have extra DVD and book copies of these publications that I can send you (no charge) if you contact me off the forum. (get email or phone from the GPN website in my sig file below.)
All the best,
Mark