I am going to get discography next week and my dr says that he will be replacing L4-5 and possibly L5-S1, has anyone had disc replacement and can you tell me what you went through. He will be using the Pro-Disc system and it has been FDA approved at 2 levels now. Any info would be helpful. This has been a 13 year battle and now I have a PPO and the benefits are great, I am a 39 year old male and the doc says that I am too young for a fusion.