Echoing the post above, I go to a DO with no ortho dept (and really no clinical research opportunities), so I reached out to the closest MD school with ortho (only about an hour away). Luckily had connections there, but you may have to email a few people before you get a response. If you're in a similar situation, go to the ortho faculty page associated with whatever residency program you're looking at, and they should specify who is the head of research of whichever subspecialty.