I didn't apply to orthopedics, but can tell you that my road into US residency as a Canadian, non-US permanent resident, non-US citizen who did med school in the US was much harder than the typical US student because I needed the H1b for residency, and about every other program I looked into refused to sponsor it, and only wanted the J1, which for various reasons I could not accept. Very frustrating. Don't think it'll be much better in ortho, one of the most competitive specialities. Sorry, OP, if I'm bursting your bubble but that was my experience. It is possible, but you may have to sacrifice location.
Now, if you're cool with the J1, then never mind the above, you should have less of an issue matching.