“…The incidence of reported cases in orthodontics is considerably less common but no less varied in the range of objects involved, and these include brackets, bands, second molar buccal tubes, transpalatal arches, removable appliances and appliance fragments, archwire fragments, sectional archwires, coil springs, expansion appliance keys, retainers, and quadhelices [ 2 , 3 , 4 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. A literature review was carried out using the PubMed database to search for case reports relating to ingestion or aspiration of foreign bodies of orthodontic origin.…”