Since I have the beginnings of arthritis in my knees, I have done a lot of research on bones and joints.
The lateral condyle of the femur,tibia, and metatarsals are very important to joint function. They are at the lower part of these bones and they are rounded to help the joints move smoothly.
If you have arthritis in the femur, tibia or the metatarsals, and you get a fracture or a stress fracture, healing time could be long. A new bone may be needed to replace the broken one.