1 Ponitz RJ, "Invisible retainers" 59 : 266-272, 1971
2 Sheridan JJ, "Essix retainers: fabrication and supervision for permanent retention" 27 : 37-45, 1993
3 Park SH, "Correction of palatally displaced maxillary lateral incisors using a tube system" 42 : 461-465, 2008
4 Proffit WP, "Contemporary orthodontics" Mosby-Year Book Inc 559-560, 2007
5 Phan X, "Clinical limitations of Invisalign" 73 : 263-266, 2007
1 Ponitz RJ, "Invisible retainers" 59 : 266-272, 1971
2 Sheridan JJ, "Essix retainers: fabrication and supervision for permanent retention" 27 : 37-45, 1993
3 Park SH, "Correction of palatally displaced maxillary lateral incisors using a tube system" 42 : 461-465, 2008
4 Proffit WP, "Contemporary orthodontics" Mosby-Year Book Inc 559-560, 2007
5 Phan X, "Clinical limitations of Invisalign" 73 : 263-266, 2007