From the point of view of bonding, the imported bottom plate is good, conforms to the shape of tooth surface, has good bonding effect and is not easy to fall off.

As far as the clinical operation time is concerned, after the hard silk is changed, the domestic silk has to go through various bends, which takes a long time and requires high skills for doctors, so the imported straight silk does not have such problems.

In terms of effect, of course, there will be no difference in theory, but here we refer to doctors with good skills, doctors with poor skills, and doctors with poor hard silk bending. The effect of import is obviously better than that of domestic production.

Moreover, in terms of friction and accuracy, brackets are imported, which can ensure the rapid and orderly movement of teeth.