I had braces several years ago and over the last year or two, I've noticed that one of my front teeth seems to be coming down lower than the other. I don't know if it was always like this or if it is just moving but it really bothers me. Even when I wear my retainers, it doesn't seem to help very much. What would be the best way to achieve the mose symmetrical smile possible? Sublingual braces? Regular braces? Invisalign? Is there anything I can do about it from home?