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2: Disadvantages of Mechanical Effective Characteristic
Correct Crowding Anteriors
Rotation Control
Individual Torque Control
Correct of Curve of Spee

Correct Crowding Anteriors : Rotation Control

Pretreatment

Posttreatment



3:Bracket placement:


To overcome some of the disadvantages, we have conceived a new idea of placing brackets on the six upper anterior teeth at an angle of 45‹ to occlusal plane.

We mount the bracket, keeping a 45‹ slot for an occlusal plane. In fact , brackets are put on the model temporarily using TARG , and after,mounted on teeth with indirect bonding method. We@ use an usual bracket for a premolar and a molar.