"Twelve weeks before camp I broke my [right] arm", Wilder told a group of reporters on the streets of LA on Monday, adding: "We kept that a secret".
Showtime Sports President Stephen Espinoza said May or June might be more likely, giving the fighters more time to recover.
It now remains to be seen what direction Wilder goes in, with a rematch against Fury and the victor facing Joshua later in 2019 one possibility.
Instead, Wilder was forced to defend his WBC heavyweight title against Fury at the Staples Center, a move which almost lost him his belt.
"We wanted to keep that sewed up, we don't make excuses".
"I had surgery and everything".
"He was landing some punches but majority was pitty-patter, they didn't affect me", Wilder said.
"I was going to the body, his elbow was out and my bones and his elbow went in like a hammer to a nail and just broke it".
Wilder claimed in his postmatch comments that his two knockdowns "definitely won the fight" while Fury said the "world knows" he was on the right end of the result, which was scored 115-111 for Wilder, 114-112 for Fury and 113-113. "That whole camp I rallied through, I barely threw any punches my whole entire camp".
As far as Wilder and Fury, Khan feels that it might be better for both of them to take an interim-bout and then come together for a rematch.
But even with Joshua holding what he calls his belts, Fury isn't too concerned.
However Wilder said a rematch was all but inescapable.
After Wilder's co-manager Shelly Finkel suggested a Wilder-Joshua showdown could happen, Joshua wrote on Twitter: "What took this fool so long?"
Wilder had lobbied for a fight with Anthony Joshua, who holds the other three championship belts.
"Anyway well done Fury!"
"If everything is in the paper, I have no desire to discuss anything, and let him go fight who he wants", he said. I'll give you a fair one when you're ready! "Either one of you!"
Wilder (40-0-1) knocked Fury (27-0-1) down twice late in the fight, but many boxing experts agreed he was outboxed for much of the fight. "I'm ready to give the fans what they want to see and end this talk once and for all", Wilder said in a conference call reported by the Associated Press.