Credit: Twitter

Can you believe how fast Teen Mom star Maci Bookout's son Bentley is growing up? The 4-year-old motocross prodigy recently took a trip to the dentist and did an excellent job, according to his famous mama. And, as expected, Maci couldn't be prouder!

Credit: Instagram

"My little guy isnt so little anymore! but he is doing great at the dentist this morning!" Maci posted to Instagram, along with a pic of Benny lying back getting his cleaning. Let's hope he earned a sticker!

We don't know the results of his checkup yet, but we expect the little tyke to pass with flying colors. Maci's always doing what's best for her son, including making sure he goes to all of his regular doctor visits. Back in November, the 21-year-old took Bents for his annual physical, and though she was nervous, everything checked out just fine.

"Glad that doctor visit is over! I'm extremely blessed to have a handsome, happy, and healthy four year old!! all i need is Bentley," she wrote at the time.

Maci doesn't often get the credit she deserves, but she's doing a fantastic job as a single, working mom. Bentley is one lucky kid!