I am blessed with good teeth. I never had to have braces, and when I had my wisdom teeth removed, my oral surgeon said if everyone had teeth like mine, that he would be out of a job. He said my bite was as close to perfect as he had ever seen, and even asked to take a cast of my bite so he could show people what a correct bite was supposed to look like! I knew I had always had straight teeth, but had no idea I had a textbook bite. Live and learn.
My sister had to have her bite corrected, though. She had to wear that headgear. Her teeth were straight, but her bite was out of alignment. She had to wear the headgear at night for like two years, and had to wear a retainer for three.