I had a chin square jaw revision surgery at the end of March from Dr. Hanul Jeong of Seoul Face 21 Oral and Maxillofacial Surgery. The reason for the revision was simply that it was not effective, so I had it shaved again... But I didn't want to shave it too much, so I wanted someone who could shave it well. I'm very satisfied with the results of the surgery!! I still have some residual swelling, so I'm waiting.