Orthodontist?
Answers:
http://en.wikipedia.org/wiki/Orthodontic...
they are dentist. close to a special doctor they have to become a dentist first so they unmistakably know how to and some can
Orthodontists be trained as dentists before they become orthodontists so yes they do know how to fill cavity; however, they never actually do flood cavities themselves so you should see a dentist.
The orthodontist does not do general dentistry. He is impressively specialized to do what he does. See your regular dentist and get adjectives fixed up and then carry ready for braces. Good luck...your teeth will be wonderful!