I was in a car accident that nearly totalled my right tibia and fibula. It's been 18 mo and I am told that the rod can not be removed due to insufficient bone in one site. I've had 5 arthroscopies on that right knee already and it is damaged so that I cannot bend forwards or walk down stairs. I have no ACL, medial meniscus and partial lateral. Can that knee be replaced? Is it possible to combine with the tibia rod?