There are many ways to change the world and the lives of people you come into contact with. And maybe you’re thinking that fixing smiles is kind of a surface-y way to go about it.

Sure, how we look isn’t the most important thing in the world, but there are two things Dr. Felipe Rossi (and his patients) know: First, you can’t put a price on confidence. And second, there are some people out there with teeth so bad that even eating the foods they enjoy becomes nearly impossible to do. After all, people actually do need teeth.

To help with both, Dr. Rossi and his NGO Por1sorriso travel the world putting smiles back on the faces of some of the poorest people on the planet, all for free.

Below are 18 of his greatest transformations – each guaranteed to put a smile on your face, too.

18. I bet she wants to smile all the time now.

17. It easier to make her laugh now, probably.

16. The look in her eyes tells the whole story.

15. He just lost 20 years.

14. That precious smile was there all along.

13. Her eyes are sparkling.

12. She looks like her, only more confident. Go, girl.

11. His expression makes me want to give him a hug.

10. I love it.

9. I bet he becomes a dentist one day.

8. What a beauty.

7. It’s hard to believe what a difference it makes.

6. You won’t even believe it.

5. This is such amazing work!

4. So handsome!

3. Wow, amazing!

2. Just looking at this picture makes me want to cry along with her.

1. This sweet little boy.

 

I couldn’t love this story more. Truly.

Have you had your teeth fixed or straightened? Did it change your life? Please tell us all about it in the comments!