At time of claim 59 yo male 59 yo male 6 260 lbs 6 260 lbs History of severe constant bilateral knee pain for the past several years History of severe constant bilateral knee pain for the past several years On examination moderate crepitance and minimal varus deformity On examination moderate crepitance and minimal varus deformity Range of motion is 0 to 135 º Range of motion is 0 to 135 º Weight bearing X-ray examination shows severe degenerative joint disease Weight bearing X-ray examination shows severe degenerative joint disease