HI Ashlead, someone will come along with some useful information soon. Sometimes it takes a while to have someone who has had that done to see your post.
Another way to connect with those that have your type of cancer is to use the search feature on the left side of the "People" page. You can select osteosarcoma from the type list and get a list of everyone on the site with that diagnoses.
Then you can contact each one if you want and ask them directly.
Hope you find some useful information.
Did you happen to have Osteoradionecrosis?