CFR › Title 21 › Part 882 › §882.507021 CFR §882.5070Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A bite block is a device inserted into a patient's mouth to protect the tongue and teeth while the patient is having convulsions.(b)Classification. Class II (performance standards).