Kardashian thanked her dentist, Dr. Kevin Sands, in a tweet:
"Thank you @drkevinsands for being the best dentist ever! If only we could all be put to sleep like Lamar [Odom] LOL maybe next time :)," she wrote.
Dr. Sands tweeted a photo of his smiling patient:
Straighter teeth is just another part of Kardashian's changing look. She recently told Cosmopolitan UK that she'd lost 25 pounds since her husband Lamar's return to the Los Angeles Clippers last year.
"I'm confident in who I am. I've always known that I'm not Kim and I'm not Kourtney -- I've always been OK with that," she said. "I probably thought I was prettier before I entered the spotlight because being compared to somebody else every day does sort of beat up your spirit and soul. But it's made me stronger. I've gained another level of confidence."
2014: The Year in Music [PHOTOS]