What is the difference between oral and dental?

Dental cavity department, dental surgery, dental prosthodontics, dental orthodontics, periodontidae, mucosa, dental prevention department, and even dental pediatrics. And dentistry can only contain dental medicine, dental prosthology, etc.
The relationship between a gp and a dentist is like a missile and a rocket!
The tongue is looking for dental mucosal disease, or dental surgery, general hospital is not divided so fine, seek dental surgery to see directly.