I was born with a prognathism, but my parents told me that double jaw correction would never be possible, so I started non-surgical correction in the 6th year of elementary school and finished it in the 3rd year of middle school. Now, I persuaded my parents and went to get orthognathic consultation, and all the doctors said it was amazing that my jaw looked like this and my occlusion was aligned properly haha.. If you don't want to have surgery, they recommend non-surgical correction. However, this correction makes chewing easier, but it doesn't suit your face shape. I can tell you for sure that this has changed significantly and is not getting prettier. My occlusion was good, but I needed external changes, so I decided to double jaw. I am grateful to the director who adjusted my occlusion well. I had a chin when I was in school, but I think I would have died if I hadn't gotten my occlusion corrected.