I'm currently 20% SC for my left knee & 10% SC for my right shoulder. My question is this. What are the requirements for 30% on a knee? I'm going in for my 4th knee surgery in two weeks (I need a knee replacement but due to my age they want to try one more scope first). My last MRI revealed a chronic complex tear of the posterior horn and noted that much of the cartilage was grade 4 (the worst). I'm going to apply for temp 100% while I recover from my surgery but should I apply to have my knee permanently increased as well? I have pain from the knee constantly but don't know if they take that into consideration.