ORTHO TRIBUNE | NOv./DEC. 2009 The results of this design specific to de-rotation of a single tooth, or a group of teeth, are very poor and require a lot of time. Magic lingual brackets are designed with a special slot. In these brackets the arch wire will not disengage the slot, and the leveling forces are very effective in achieving all the movements efficiently. OT * (Dentaurum, Turnstr. 31, 75228 Ispringen, Germany; www.dentaurum.de) Trends 5 Fig. 10b: Intra-year the space is nearly closed. References 1. Ye, L. and Kula, K.S.: Status of lingual orthodontics, World J Orthod. 7:361–368, 2006. 2. Geron, S. and Ziskind, D.: Lingual forced eruption orthodontic technique: clinical considerations for patient selection and clinical report, J Prosthet Dent. 87:125– 128, 2002. 3. Sander, C., Sander, F.M. and Sander, F.G.: The derotation of premolars and canines with NiTi elements, J Orofac Orthop. 67:117– 126, 2006. 4. Smith, R.J. and Burstone, C.J.: Mechanics of tooth movement, Am J Orthod. 85:294–307, 1984. 5. Geron, S.: Rotated teeth in lingual orthodontics: problems and solutions, Lingual News. 1:2002. 6. Bednar, J.R. and Gruendeman, G.W.: The influence of bracket design on moment production during axial rotation, Am J Orthod Dentofacial Orthop. 104:254–261, 1993. 7. Nidoli, G., Macchi, A., Lazzati, M. and Casagrande, V.: [Lingual appliances], Mondo Ortod. 14:23– 30, 1989. 8. Sorel, O.: Creation of the magic bracket, Rev Orthop Dento Faciale. 41:39–58, 2007. 9. Matasa, C.G.: Bracket angulation as a function of its length in the canine distal movement, Am J Orthod Dentofacial Orthop. 110:178–184, 1996. 10. Shpack, N., Geron, S., Floris, I., et al: Bracket placement in lingual vs labial systems and direct vs indirect bonding, Angle Orthod. 77:509–517, 2007. Fig. 10a: Mini-screws (tomas®-pin, Dentaurum) provide efficient en-masse retraction. (Photos/Dr. Papadia and Dr. Isaza Penco, Italy) Fig. 11: For rotation and torque, brackets with a long mesial-distal distance are the best choice. (Photo/ Dentaurum) AD OT About the author Dr. Rubens Demicheri received his DDS in 1983 from the Universidad de la República (UDELAR) in Uruguay and then went on to complete his postgraduate studies at Nagasaki University in Japan. Demicheri has been an associate professor in the Department of Pediatric Dentistry at UDELAR, a visiting lecturer at the University of Alfonso X el Sabio in Spain and a lecturer on lingual orthodontics in South America and Europe. Contact him by e-mail at demicheri@ odon.edu.uy.