Keith said he is completely healed from the injury that occurred Nov. 29 against the Avalanche.
"I'm able to go 100 percent," Keith said. "I wouldn't be going back in the lineup if I wasn't, especially with the type of injury I had. We wanted to make sure it's good and it feels good so we'll see how it goes."
Against the Avalanche, Keith was paired with Connor Murphy to start the game and later rookie Adam Boqvist and finished with a game-high six shots on goal, two blocks and a hit in 23:16 of ice time.
"It was good to be back," Keith said. "I tried to have a good gap (and) I felt like I was able to break up a few plays there coming off the rush early in the game."
Keith said the most difficult aspect of the injury was not being able to help his teammates during a rough stretch. The Blackhawks went 3-5-1 during his absence.
"It's been tough," Keith said. "Watching the games it makes it more difficult when you can't be part of it to help."
Keith's teammates were pleased to have their top defenseman and a leader back on the ice.
"We've definitely missed him since he's been out," winger Patrick Kane said. "He brings a lot of stability back there. You can play him in any situation. He's a guy that I think just calms everything down back there. Obviously, he's had a special career with what he's done, a couple of Norris trophies, Conn Smythe (and), obviously, the (Stanley) Cups. The thing about him is it doesn't seem like he's slowing down. He's always trying to improve and always trying to better himself. We welcome that back, for sure.
Said Colliton: "When you don't have him, it certainly highlights what he does for us in all situations, makes the guys he's playing with better. Excited that he's healthy, too, because he was kind of battling it for a while."
With Keith back in the lineup, veteran Brent Seabrook was a healthy scratch for the third time this season. Rookies Dennis Gilbert and Boqvist remained in the lineup against the Avalanche.
"We've got to find a spot for 'Dunc' and we have some young players who have played well," Colliton said. "With where we are (in the standing), we can't expect to make improvements-turn this thing around-if we don't give opportunity to young players."