In 2008 I had to have a left knee revision due to my zimmer device becoming loose less than two years after the initial replacement. Since then I am in chronic pain and have permanent nerve damage on the left side of my body. My mobility is very limited and I use a walker or wheelchair. I had a neurostimulator implanted In January 2013. It help a little with the pain. I am under the care of a great pain mgmt doctor but much of the medicine just masks the pain.