What is the difference between metal self-locking correction and traditional steel groove? What about those prices?

Self-locking brackets are different from traditional brackets in design structure and use principle, with better effect, but more expensive.

The traditional bracket structure has no locking piece and is an open structure. In order to prevent the orthodontic arch wire from loosening, it is necessary to "bind" the arch wire to the bracket with a ligating ring. In this way, there is a large friction resistance between the arch wire and the bracket and the ligating ring, which is not conducive to the bracket sliding on the steel wire.

The self-locking bracket structure is provided with an openable locking piece. Under the action of the internal elastic steel needle, the locking piece will not automatically close after opening and will not automatically slide open after locking. After installing the archwire, the doctor only needs to gently lock the locking piece to prevent the archwire from loosening. Moreover, because there is no forced "binding" between the archwire and the bracket body and the locking piece, there is no great frictional resistance, so the bracket can freely slide along the direction of the archwire during orthodontic treatment, which makes the orthodontic effect more obvious and the orthodontic period shorter.