During the 24-hour surgery, surgeons lifted an entire face, including jaw, nose, cheekbones, muscles, teeth and eyelids, and placed it masklike onto the man.
Oscar's face was severely injured in a shooting accident. He had nine operations before being considered for the transplant.
He'll need 18 months of physical therapy, but is expected to regain 90 percent of his facial functions.
AP contributed to this report.