Nearly 6 months post banding, a 1.6x8 mm anchor pin is placed (Fig.7,8).  Next visit the pin is loose and replaced with a ball type 1-piece implant (2x10(2) mm).  矫正器造成CT射线干扰，影响导板精确度。

Prevent Debracketing Last Next 手术 Xin Wei, DDS, PhD, MS 1st edition 10/12/2018, last revision 01/05/2021