Pondexter made a critical tipin with 26 seconds left to thwart the Vikings (7-2) down the stretch.
Brockman, a senior forward who leads the team in scoring average at 16.8 points and rebounding at 11.4, sprained his right ankle during Saturday's practice and was unable to play.
With the Huskies leading 82-80 with five seconds left, Dentmon sealed the game with a pair of free throws. Waters made a desperate 3-pointer at the buzzer to finish it.
Former Kentucky guard Ed Davender, the only Wildcat with at least 1,500 points and 400 assists, has died. He was 49.
Guard Naz Mitrou-Long, whose 2015-16 season ended in December due to hip problems, has been granted a hardship waiver for the coming season, Iowa State said.
As the Sooners look to life without superstar Buddy Hield and his sidekicks, it's clear their unseasoned players will need to grow up fast.