Antonio Rodrigo Nogueira, whose arm was broken at UFC 140 in Toronto, has had a plate and 16 screws inserted in his arm.
The surgery is detailed in an entry on the Brazilian heavyweight's website attributed to Dr. Tom Hackett of the Steadman Clinic in Vail, Colo.
"I'm feeling better," Nogueira tweeted.
Nogueira's humerus was broken when he refused to tap to a Frank Mir kimura on Dec. 10 at the Air Canada Centre.
Initial reports were that surgery was not needed. But Hackett says the radial nerve, which affects power and sensation to the hand, was affected.
"The nerve was in the area of the fracture and the bone was pinching the nerve," Hackett wrote. "Prior to the surgery he had very little strength in his hand and no strength in his thumb."
Since the surgery, function is returning to the hand.
"If everything goes well he will begin full training in the next several months and should be 100 per cent for competition fighting in six months or less. We anticipate a complete and full recovery."