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Several Types Of Self-ligating Brackets
Aug 15, 2018

Self-ligating brackets are divided into active and passive types, which is actually whether the clip exert active pressure on the archwire. Active self-ligating brackets represent products with in-ovation self-ligating brackets, forestdent quick self-ligating brackets, AO Time2 self-ligating brackets and T3 self-ligating brackets.



Passive self-ligating brackets represent Ormco Damon series self-ligating brackets and 3M Smartclip self-ligating brackets.


For active self-ligating brackets, their advantage in the control of the torque and the clip exerts a constant light force. But the disadvantage is that the friction is large. The friction is proportional to the positive pressure on the surface of the object, and of course the continuous pressure of the clip increases the friction. The force of the clip is sometimes difficult to achieve the effect of root control.

For passive self-ligating brackets, they have the advantage of low friction and can quickly align the dentition in the early stages. But the shortcoming is that the later root control is difficult, the heavy square wire can not be put in, the key is that sometimes the clip can not be closed, the thin square wire can not play a role.

Therefore, the key to the current self-ligating bracket is friction and control.

There are two types of brackets that are special, that is, AO Time2 and 3M Smartclip. When they put 0.012, 0.014, and 0.016 archwire, the clip does not produce a positive pressure on the archwire, so it is passive at this time. The 3M Smartclip is a two-wing design that reduces the spacing of the brackets compared to other self-ligating brackets, so early alignment is not ideal in crowded cases. AO Time2 early alignment and speed are similar to Ormco Damon series of self-ligating brackets.

When the two brackets are placed in a square wire of 19*25 or more, the rooting effect is better than that of other passive brackets. Both brackets are recommended to be placed in 19*25 archwires, while Time2 brackets are recommended to be placed in thicker squares for better root control. Only these two brackets do not shy away from saying that you can use the ligature ring if necessary. The 3M Smartclip is designed to better solve the problem of torsion and compare the ligature ring to the car turbo. AO Time2 uses a ligature ring to satisfy the children's preference for color.

In fact, each type of self-ligating bracket has its own characteristics. The key is how to choose the right case to avoid weaknesses. In severely crowded cases, try to choose a narrow bracket, passive type, or else the bow wire can not be worn, of course, the speed is slow. Properly oriented self-ligating brackets with good control points should be chosen for the teeth with neat teeth. If the teeth are sharply selected, the Tip-edge bracket allows him to tilt and move, and the teeth go faster. If you do not need to remove the tooth, you need to change the tooth shaft to solve the protrusion. You need to choose the bracket with large friction and the implant anchorage. At this time, the self-locking bracket will not work well.