1. Handbook of orthodontics;Moyers,1966
2. Protraction of mandibular second and third molars into missing first molar spaces for a patient with an anterior open bite and anterior spacing;Baik;Am J Orthod Dentofacial Orthop,2012
3. Titanium screw anchorage for protraction of mandibular second molars into first molar extraction sites;Nagaraj;Am J Orthod Dentofacial Orthop,2008
4. Miniscrew anchorage used to protract lower second molars into first molar extraction sites;Kyung;J Clin Orthod,2003
5. Rigid implant anchorage to close a mandibular first molar extraction site;Roberts;J Clin Orthod,1994