Hi, I was in a car accident 3 months ago and had a clean break of the femur (mid-shaft). I had an IM nail inserted with a pin at the hip and two screws a the knee. Recent x-rays showed that the bone was not healing. My consultant seemed suprised as I am a young and healthy non-smoker. I have been partial weight bearing on crutches for the last 2 month and doing well in physio. They suggested that I have the bottom screw in my knee removed, which I am due to have done in 2 weeks. Please can you advise me if this operation is generally successful in promoting bone growth? I am very worried about having a nonunion and wondering if a bone graft would be better? I can't understand why the bone is not healing, if you have any other suggestions they would be most appreciated.