I’m a current OMFS resident. As for how competitive the application process, there are around 225 residency spots for OMFS for about 6000 dental school graduates. Assuming not all of the top students want to enter OMFS, many do, and a ranking in the top 10% would greatly increase your chances of matching. The other side of the equation is the CBSE, an extremely difficult exam that is similar to the USMLE step 1. If you don’t match, you can always do an internship to increase your chances, and with experience, programs can be more forgiving with your stats, especially 4 year programs.
As for salary, it depends. Academic salary start at around 250-300k right now, but it is a slow climb to 400. You receive awesome pensions, and you can also qualify for public service loan forgiveness. In private practice, you can associate out of residency for around 250, but it can climb exponentially if you partner or build your own practice. You can also be a traveling oral surgeon, where dentists collect patients for you, and you come by their office once every few weeks and collect 40-50% of the production. If you play your cards right, a million a year of net income is not out of the question.
As for MD vs Non-MD, I chose this route because I want to future proof myself while I pursue a career in academics. About half of the positions available right now are MD positions, where you complete an additional 2 years for your MD. There is no difference in procedures in what you can do from an MD vs non-MD oral surgeon, and hospital privileges are based on how qualify you are to perform that particular case. There are less applicants who apply for the MD route, but the standards are higher since many medical schools have a say on whether they will accept you, so you have to go through 2 screens, instead of just your OMFS program.
As for Trauma, it is not required for you to take call if you don’t want to. Although, taking a certain amount of call is necessary to be board eligible, which ensures that you keep updated on all the recent changes in OMFS. Some oral surgeons proudly display they are board certified, and it can give the public confidence that they are receiving the highest level of care.
I suggest you shadow an OMFS program, and even ask if you can observe them in the OR. Most of the Oral surgeons who work at the hospital is associated with a residency program.