I've said it before on here, I'll say it again. DO NOT MAKE A SCHOOL CHOICE BASED ON SPECIALIZATION "CHANCES". Go by your gut. My advice to you is not to take advice from anyone else on this board. These are people who are in or attempting to attend dental school. Do they sit on a OMFS admissions board? Do you even have a clue about dentistry right now since you obviously haven 't done it yet? Do you know 100% what you want to do with your dental education (specializing, public health, etc.? NO you do not, I learned that real quick when I finally got my hands dirty.
Make your decision based on what you feel better fits you as far as a school. That's lifestyle, the community, etc. not just the school itself. You are about to make a huge life decision, make sure that you make it for yourself, not based on some hearsay/random stats showing that UPENN matches a ton of foreign students into Perio programs. Information students on her have about the community, their experience at the school, and whatnot is great info that will help this decision, but don't go by some silly stats.
I can't stress enough to people not in dental school that this whole mentality about " I need to go to a good school in order to be an OMFS and make 1.3 a year" is a bunch of crap. If you want to do something...anything...in dental school set a goal and work harder to obtain your personal goal while you are in school. If you work hard and make yourself stick out that's all you need. People match into All kinds of programs from ALL schools in the country. I say it's just like poker, you can get a long way by playing the game, but in order to win you have to still be holding the cards. Being from a "good school" doesn't mean dick when you have a 3.0!
I say this alot on here and I know it sounds pessimistic, but making a decision based on a CHANCE of specializing is a horrible idea. I've watched tons of kids have dreams and aspirations shattered in school because they came in with the mindset they were going to be orthos and never considered other ideas in the realm of dentistry. By the end of the first semester they found themselves out of the "race." Dental school is hard, it is no picnic!!! Now that you are in just focus on making friends, doing good work, and getting those grades that you need to set yourself up for whatever. After your first two years if you have what you need, then start making those strides towards a career within dentistry which fits you best. Use school to explore options in dentistry and determine your personal niche, you'll be surprised, I was way off!,
So the final word, Trust yourself, Good luck in you endeavors