Cephalometric modifications in patients with Class ΙΙ division 1 treated with Twin Blocks. Polyclinic “Juan Manuel Páez Inshausti”. February 2013 – January 2014

Abstract

To treat Class II Division 1 syndrome caused by mandibular retrognathism   and the patient is at an age when he is growing, the therapeutic method of mandibular advancement is used to eliminate this discrepancy between the bony bases, whenever the patient doesn’t present a prevalence of the vertical growing of the face. In order to evaluate cephalometric changes with Twin Blocks in the treatment of Class ΙΙ division 1 syndrome, a quasi-experimental intervention study of the before and after type without control group was performed in the patients who entered the orthodontic practice of   policlinic Juan Manuel Páez Inshausti, New Gerona, with ages between 11 and 14 years in the period covered between February 2013 and January 2014 with Syndrome of Class II division 1, where an universe of 8 patients was used. The basic twin blocks was set and the obtained changes were determined at six months of initiating the active stage of treatment by means of the cephalometric test of the lateral teleradiographs of skull. At six months the most significant cephalometric changes were the reduction of  SNA and the increase of  SNB with a significant reduction of  ANB in 3.25°. The mandibular length increased significantly in 6.9 mm the same as the lower facial height in 3.5º. A significant retrusion of the upper incisor was achieved.The twin blocks are an effective method for the treatment of this malocclusion.