I had my MTA corrected at a dentist in Seongsu Station 7 years ago. I didn't extract my teeth and grinded my teeth a little. It was a short period of time, so there was no change in my mouth, but my rabbit teeth disappeared, and I became prettier when I smiled. I had it for about 10 months. The teacher wore glasses, and he was always kind and kind. ! Currently, I have a retainer that I wear once a month while I sleep and a retainer that I wear all the time. I was worried that this would be uncomfortable, but it doesn't bother me anymore. Sometimes the iron sticks out and I go to the dentist to reattach it, but I'm thinking about just removing it. They said it doesn't matter because it's old.