Surgery

My daughter will have to have another surgery this year to fuse her knee to the bones in her lower leg and try to stablize her hip. I am just wondering if anyone else has had this done and if it has helped. I do not want to put her through the surgery if it is not going to help. She is 5 so it will be different than when she was 15 months and had surgery. I would appreciate any advice you all can offer.