{"data":{"id":"us/21-cfr-872.1850","jurisdiction":"us","citation":"21 CFR 872.1850","heading":"Lead-lined position indicator.","body":"(a) Identification. A lead-lined position indicator is a cone-shaped device lined with lead that is attached to a dental x-ray tube and intended to aid in positioning the tube, to prevent the misfocusing of the x-rays by absorbing divergent radiation, and to prevent leakage of radiation.\n(b) Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 872.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 872—DENTAL DEVICES","Subpart B—Diagnostic Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"6201b4a6a72a4e03f36d1517cf8df84b9aa79456817f1de4861f22a95f6bb3a9","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-872.1840","next":"us/21-cfr-872.1870"},"notice":"GroundRules: Original legal text. Not legal advice."}