Oral surgery as a dental speciality deals with various surgical procedures inside the oral cavity. Often oral surgical procedures can be performed by your general dentist. Having a tooth extracted is a good example of this.
There are a variety of circumstances where your general dentist will decide that a referral to a specialist oral surgeon is required. For example, impacted third molar (wisdom tooth) surgical extraction, surgical removal of cysts or other growths from the jaws and bone augmentation prior to implant placement.