I had left total knee replacement 1/14/15 (arthritis for many years) and the next day I was standing up with much less pain than I had for years! I am grateful to Dr. Alejandro Gonzalez Della Valle for restoring my ability to walk. I was able to drive 2 weeks post-op, and was back to work in 4 weeks. The whole experience has been nothing short of a miracle for me! I am looking forward to having right total knee replacement surgery at HSS in April. Thank you!