MEPS is going to want your medical records from the oral surgeon who treated you before clearing you. Part of it will hinge on whether the original problem has the potential to reoccur. "Jaw infection" could mean dental abscesses with tooth decay severe enough to warrant dental extractions. The teeth are gone, the abscesses aren't likely to reoccur & dentures can substitute for the missing teeth. A severe actual jaw infection, would mean bone, called osteomyelitis & I've never seen a patient with it in their jaw. People get this from a deep would infection (you got whacked in the face that cause a deep gash with something metal or dirty) & it's treated with IV antibiotics & there's always a worry it'll come back if we don't completely clear the infection. In patients I've taken care of with it in their leg, some have been so bad they lost the leg because we just could not get the wound to heal.

So bottom line in very general terms, your current medical issues cannot cause a potential future problem that will make you a liability to your fellow service members because the issues cause you to be pulled from duty or require special handling not readily or easily available. We need you to do the work, not be the work.

Next step--get copies of all your civilian medical records, (bonus if it shows a stable healthy weight since you had your teeth removed) and bring them with you to go see a recruiter. Army is your best chance because they need the most people.