On-loan Arsenal forward had to be substituted after just 15 minutes during the win over Swansea, a disappointment for the Black Cats after decent form recently
The on-loan Bendtner was accidentally caught in the face by the boot of Swansea's spanish right-back Angel Rangel during the 2-0 win on Saturday, and results have revealed that the forward has sustained a fractured nose.
There had been fears at first that the Arsenal-owned striker could have done damage to an eye and other parts of his face, however that has now been ruled out, although he does seem set for a short period on the sidelines.
The head of Sunderland's medical department, Dr Glen Rae, told the club's official website: "The results of the scans have been received and Nicklas will now undergo further treatment.
"Sunderland Royal Hospital provided a first-class response and I would like to thank them for their assistance."
Bendtner will almost certainly miss the FA Cup fourth-round tie against Middlesbrough on Sunday, while he will also remain a major doubt for the following Premier League matches against Norwich City and Stoke City.