7 ms·

I guess this: Straighter Teeth by Mail - https://news.ycombinator.com/item?id=8998267 https://news.ycombinator.com/item?id=8998267 Also from a while back: In

by percept 11y ago

I guess this: Straighter Teeth by Mail - https://news.ycombinator.com/item?id=8998267 https://news.ycombinator.com/item?id=8998267 Also from a while back: Invisalign and 3D Printing - https://news.ycombinator.com/item?id=6373936 https://news.ycombinator.com/item?id=6373936