Issues after disc replacement

I am new to this forum. However I am not new to spine issues. I am looking to hear if there are others who have had issues with total disc replacement. In 2006 I went to Bogen Germany and had a 3 level replacement done using Prodisc (Dr. Bertagnoli was the spine surgeon). I had 3 good years and the last 4 not so good. I once again work with a pain management doctor who is excellent. I take Nucynta ER daily and take up to 2 50 mg a day of Nucynta for break through pain. I have had multiple SI and facet joint rhizotomy with some pain relief. I swim 4 to 5 times a week and also work with a pain management psychologist. I now have facet joint disease and need a 3 level fusion. I am interested in hearing from others who have had issues since having total disc replacement.