I just joined this forum and added you to my contacts. I too am having trouble with this implant. Really always have. It was implanted in fall of 2010 and the radiologist have said it is not optimally fused and is unstable. I have neck pain, headaches and occipital nerve pain from it. I have read the brochure on the surgical technique and it has instructions on removing it. I wonder how possible this is at this point??? I am a hybrid ADR/TDR patient and this is also causing complications with H.O. formation at lower levels.