1. Nonextraction treatment;Cetlin;J Clin Orthod,1983
2. Palatal bar and lip bumper in nonextraction treatment;Ten Hoeve;J Clin Orthod,1985
3. A lip activated appliance in early orthodontic treatment;Ghafari;J Am Dent Assoc,1985
4. A cephalometric study of the clinical use of the mandibular labial bumper;Bergersen;Am J Orthod,1972
5. The use of tissue-bearing anchorage alone and in conjunction with various techniques in treatment;Bedell;Am J Obstet Gynecol,1954