HHS-OASH-2026-0397-1300 https://www.regulations.gov/comment/HHS-OASH-2026-0397-1300 I am submitting information concerning an under-recognized pathway of human exposure to electromagnetic fields (EMFs), radiofrequency (RF) radiation, and wireless radiation: the presence of permanently implanted dental metals in the oral cavity. Although systematic data on this specific exposure route remain limited, a sufficient body of existing scientific and clinical observations warrants closer examination by the Department of Health and Human Services. Tens of millions of Americans carry conductive metals in their teeth—including mercury-containing dental amalgam, titanium implants, nickel-based crowns and alloys, and other metallic restorations—creating a potential interface between ubiquitous wireless radiation sources and biological tissue that has received little formal attention. Given the scale of this population and the permanence of these materials, further investigation is both warranted and overdue.