Across dental offices, a quiet signal is emerging from the mouths of the young: worn enamel, flattened teeth, and aching jaws that speak to pressures far beyond the dental chair. Bruxism — the unconscious grinding of teeth, long associated with middle-aged stress — is appearing with new frequency among teenagers and young adults, prompting practitioners to reconsider who bears the weight of modern anxiety most visibly. The body, it seems, keeps its own record of the times we live in, and for a growing number of young people, that record is written in bone.