It is mainly used for the third series of bending to help increase the anchorage for the rapid and flexible movement of the posterior teeth.
The upper teeth are divided into large, medium and small, and the lower teeth have only one conventional size.
Features: 1. Made of high quality medical metal 2. Good bonding effect 3. High precision and smooth on face 4. Can be directly bonded on tooth surface, a traction with its resistance
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