1. Orthodontic appliance (multiple lingual orthodontic appliance);Fujita;Japan patent,1976
2. Fixed lingual orthodontic appliance for the maxillary arch;Kurz;US patent,1981
3. Individual indirect bonding technique (IIBT) using set-up model;Kyung;J Korea Dent Assoc,1989
4. The mushroom bracket positioner for lingual orthodontics;Kyung;J Clin Orthod,2002
5. Severe bialveolar protrusion case treated with lingual plain wire appliance & micro-implant anchorage;Kyung;Dental Focus,2004