https://kidshealth.org/en/parents/bruxism.html# http://kidshealth.org/en/parents/bruxism.html cause of bruxism remains unknown bruxism KidsHealth.org 3 in 10 Bruxism (Teeth Grinding or Clenching) (For Parents) bruxism in kids 3 in 10 Kid's Health 3 in 10 kids health KidsHealth.org 3 in 10 KidsHealth.org cause of bruxism remains unknown