Aims: to illustrate clinical and biomechanical advantages of treatments with the new generation lingual barckets i-TTЯ(RMO®).
Materials and Methods: 85 orthodontic cases characterized by different malocclusions and treated with the i-TTЯ lingual technique have been selected.The new bracket presents two self ligating slots, one occlusal and one gingival,for automatical insertion and disconnection of round archwires,one central tube with rectangular section,for auxiliary sectionals either for anchorage or for active orthodntic movements.The i-TTЯ is used with Ni-Ti preformed archwire.012,.014,large,medium e small,maxillary and mandibular,and Australian archwire of the same sections.The automatical insertion of the wires is vertical,no bindings are necessary and there are no components in movement.
Results: i-TTЯ brackets allow and individual and selective control of the friction,with the possibility to differentiate it between frontal and laterel segments of the dental arches,due to the curved base of the slot,of the anchorage and of the orthodontic movement giving maximum biomechanical control alredy from the first phases of treatment till to the spaces closure and finishing, without using a rectangular archwire.The torque control is obtained using two archwires or sectionals,inserted in parallel in to the two slots and activated with opposite first order bends,that is a non Edgewise technique.
Discussion and Conclusion: this new systematic allows an adequate sliding of the archwires during the alignment and levelling and an increased friction when maximum control is needed,a great precision for the application on the lingual surfaces,due to its spherical base,and its management versatility,in respect to the maximum comfort of the patient,because of the rounded design without edges toward the lingual surfaces.