When using this prescription, the crown of the cuspid - with more tip - fills more space on the dental arch and –“buttresses" the crowns of the lateral and central. The loss of torque is minimised, (fig. 9,10 and 11).

In other words, increasing the tip on the anteriors reinforces the anterior torque during die critical levelling and aligning phase. When using round wires a significant loss of torque is typically observed during this phase of treatment, this loss is difficult to compensate during the correction or the over-jet and space closure. We must say - as any Straight Wire practitioner well knows - that an increased tip calls for more attention to anchorage control as the appliance will apply a more buccal force on the anterior teeth, resulting in possible mesial movement of the posteriors.

Thanks to the precisely cut and smooth slot, that significantly reduce friction, STEP brackets make sliding mechanics easier.

 CONCLUSIONS

When finishing our cases with preformed appliances, we met frequent problems related to a poor fit between the appliance and the individual patient. STEP brackets were designed and produced through leading edge technologies, they demonstrate a good fit to any patient and allow for achieving treatment goals in the most simple and secure way. They reduce treatment time as well. Perfect bracket positioning is one of the key factors in the modern fixed therapy; therefore STEP brackets were designed with this objective in mind. Classic design were adopted because based upon our clinical experience, we think that the diagonal design is not helpful in order to visualize the mid point of clinical crown. The bracket mesial distal