If this is occurring, it is certainly more operator related than it is related to bracketslot size!
如果是这种情况发生，这无疑是更多的运营商有关的比它与托架插槽大小！
2
Conclusion: the attention would be played to the influence of the roughness and abrasion of the bracketslot area on friction and anchorage control in using sliding mechanics.
结论：使用直丝弓矫治技术时，应重视托槽表面粗糙、磨损对摩擦力的影响，注意支抗控制。
3
A bolt pair (4) and a hanger (1) are fixedly connected above the two axial sides of a bracket (2) mounting hole or a slot respectively.