It looks as if the tooth #3 is blocked by the neighboring teeth.  The proximal surfaces are reduced 1.5 months post orthodontic intrusion.  Fourteen days later, the gap exists distal (Fig.10 *).  It appears that the power chains placed on the natural groove of the tooth (white line) mesializes the tooth.  Then the power chains are placed over the mesiopalatal cusp.

Miniimplant Placement Last Next Xin Wei, DDS, PhD, MS 1st edition 07/25/2018, last revision 09/07/2018