Is it caused by the gums becoming shorter during orthodontic treatment? ㅠㅠ I heard that growing children often develop black triangles but they disappear as they get older. I'm old, so that won't happen. ㅠㅠ I'm still in my early 20s, but will I still get these? After correction, I'll be in my mid-20s... Can't I prevent black triangles from forming? Is this random? haha
SUNGYESA
