First of all, I straightened my teeth with non-extraction, and honestly, there was no difference.. I didnt know anyone around who had orthodontic treatment. I chose the expensive Damon Clear Gel and it was similar to the color of my teeth, so I wore it for 2 years. Okay, I think Quraden is the most comfortable toothbrush.. Be sure to use dental floss after correction.. I do it every day.. Its over.