One would like to think that there is possibility that the conflicts will quiet down over the next few years, but it is impossible to predict no matter who becomes our president. Don't turn this comment into a republican or democrat will be better thread. No one can predict what will happen.
That said, would there become a surplus of dentist? No. The only way we could get a surplus is after the conflict are over the military fills all the open dentist billets. Then, there military would have to suddenly reduce its overall numbers without reducing the number of dentists. But this is unlikley to occur. Plus, it is a continual process that dentist join and dentist leave the military. There are only so many billets available for dentists. If none are available, they are not going to bring dentists in at the time.