I don't have the link handy, but I watched an interesting video from an orthodontist describing the root cause of most crooked teeth being due to poor diet (par

I don't have the link handy, but I watched an interesting video from an orthodontist describing the root cause of most crooked teeth being due to poor diet (partially from insufficient nutrients, but also not enough hard-to-chew foods to build jaw strength), and poor posture, which causes everything else to grow in the wrong directions and proportions over the course of years. I am unqualified to comment on the validity of these ideas, but it certainly seems likely that these kinds of subtle, year-after-year health issues would get overlooked by the scientific and medical community, compared with a lucrative fix after the fact. EDIT: Found it: https://youtu.be/NvoX_wEtwDk https://youtu.be/NvoX_wEtwDk