Ortho is really hard to get into, however, if your are an excellent candidate, you can get pretty much anywhere. If you are not yet licensed, you'll need to hook-up with some big name in ortho and do research for 2-3 years and take the USMLEs (make sure you crush them). The research is obviously not needed for the license but is a "must" for IMGs trying to get into ortho. I know of a guy who did that and matched at Mayo.