bilateral toe-in bends) of the upper molars is accom-plished. This helps correct the Class II molar relation-ship. These arch wires are used until the canines and bicuspids erupt. At this point the patient is ready for phase 2, which will involve leveling and aligning, then using Class II elastics if necessary to correct any lingering ClassII relationship. Because the lateral segments must be bypassed for toe-ins to be effective, this set-up is ideally suited for early treatment. Establishing the correct distal rotation of the upper molars is one of the most important bene-fits of early treatment. Proper rotation of the upper molars is an essential aspect of a Class I relationship. By establishing the correct molar relationship in the mixed dentition, a child’s growth and development can proceed normally.(Figs. 10-12) In conclusion, proper distal rota-tion of the upper 1st molar is critical in the development and mainte-nance of a Class I molar relationship. Mild mesial rotation can be corrected by proper bracket position-ing. Severe rotations call for more aggressive intervention. Bypassing the lateral segments and using toe-in bends mesial to the molars can correct even the most severe rota-tions. Proper upper molar position is one of the most important features of a Class I molar relationship. rEFERENCES 1. Mesial rotation of upper first molars in Class II division 1 malocclusion in the mixed dentition: a controlled blind study. Progress in Orthodontics Vol12 issue 2 pp107-113 Nov, 2011. 2. Angle, Edward H.: “The Upper First Molar as a Basis of Diagnosis in Orthodontics.” Items of Interest, Vol. 28, June, 1906. 3. Strang, R.H. : Textbook of Orthodontics, Third Edition, 1950. 4. Gündüz, A. G. Crismani, H. P. Bantleon, Klaus D. Hönigl, and Bjorn U. Zachrisson (2003) An Improved Transpalatal Bar Design. Part II. Clinical Upper Molar Dero-tation—Case Report. The Angle Orthodon-tist: June 2003, Vol. 73, No. 3, pp. 244-248. 5. Ricketts RM. Occlusion-the medium of dentistry. J Prosthet Dent 1969; 21:39-60. 6. Prabhu, N. Interception of class II div.1 malocclusion by phase 1 treatment with Frankel appliance. JIADS: Vol 2 Issue 2. April 2011, p62. www.orthodontics.com Winter 2014 29
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