1. The effects of lip bumper therapy on deficient mandibular arch length;Nevant,1989
2. Lip bumper therapy for gaining arch length;Nevant;Am J Orthod,1991
3. The effects of removable expansion appliances on the mandibular arch;Legler,1991
4. The transverse stability of combined rapid palatal expansion and lip bumper therapy following comprehensive orthodontic treatment;Horton,1997
5. Muscle function, oral malformation, and growth changes;Subtelny;Am J Orthod,1966