The FDA never inspected Johns Dental Laboratories during more than a decade in which it made the Anterior Growth Guidance Appliance, or “AGGA,” a dental device that has allegedly harmed patients and is now the subject of a criminal investigation. According to FDA documents obtained through the Freedom of Information Act, the agency “became aware” of the AGGA from a joint investigation by KFF Health News and CBS News in March 2023, then responded with its first-ever inspection of Johns Dental months later. That inspection found that the Indiana dental device manufacturer didn’t require all cust…