Two diagrams of the new knees I'm getting. "Arthritis-be-gone"

Tomorrow 8:00 a.m., surgery day, I have been waiting 13 months for the surgery. But really, I gave up walking for fitness in the fall of 2003 due to pain, then my knee actually "died" April 2004. It didn't take long for my right knee to give way under the strain of the left knee. I've waited and now my turn has come to get some (hopefully) relief. I'm a little scared...mainly scared of the unknown pain which is funny considering I've been in constant pain of varying degrees for 4 1/2 years. But I'm set to go now.