i have 2, each implanted by a different doctor. i have an abs stage 2 (cervicle), and an abs stage 4 (lumbar).
i have experienced 2 very different results and am just wondering if anyone has an older one and what their results were, or if someone has a cervicle one and had good results. i am trying to decide if it makes sense to have my old one removed and replaced with a newer version.