Modern orthognathic surgery is said to be clean contaminated due to
the intraoral means of access. Complications after orthognathic
surgery, a common operation, occur about 10% of the time. Actinomycosis,
a rare specific infection, plays a negligible role. Diagnostically, it
should be differentiated from other infections that occur a long time
after the operation. Three cases of actinomycosis that occurred after
orthognathic surgery were observed, and therapeutic measurements
are described case by case.