You must be FU@$ing kidding me. Perio isn't even close to any medical specialty...let alone OMFS. I'm not going to go on a tirade on what I think of perio.......
Seriously people, everyone follows their passion... so to each their own!
At my university perio residents got to do a lot of cool stuff and they do surgeries so yes it is a medical specialty!!! they do more surgeries (soft tissue, bone grafts and implant placements and lets not forget about atraumatic exos that OMS really dont know how to do, etc) than radiology that someone mentioned! so let the perios so their job and arrogant OMS to do theirs.