CFR › Title 21 › Part 872 › §872.183021 CFR §872.1830Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A cephalometer is a device used in dentistry during x-ray procedures. The device is intended to place and to hold a patient's head in a standard position during dental x-rays.(b)Classification. Class II.