Sorry about not matching, fortunately there are definitely still ways to get in to ortho. Even though you are in a different scenario than the other guy that posted with your scores, and already having done a research year, I think I would recommend doing another research year if you truly are set on doing ortho.
From that thread:
"I would 100% recommend doing a research year based on what I have heard/seen. By doing a prelim year you sort of pigeon-hole yourself in to that program and hope the ortho program there likes you. Also, your application essentially doesn't change by going the prelim route...other than one more person saying you work hard and you are now applying as having already graduated instead of a US Senior.
The research year will open doors at that program, and hopefully many others by bolstering your research stats and having the research doc make calls for you. You also can delay graduation from your school so you are still applying as a US Senior. Hopefully they will help you with interview answers stand out as well, since that probably played a part in not matching as well."
For what it's worth, I had a 221 step 1 and matched, also did a research year but killed it (20+ papers published). Even though you have already done one, I think it is still your best chance to do ortho but you need to find a killer research year with someone who will go to bat for you and make calls to other programs.
As far as your questions, I know people who didn't match 3 times and then eventually got ortho...so it's always possible. I don't know anything about prelim years