There is buccal plate collapse and gingival recession at #4 (Fig.8 *), probably related to buccal placement (buccal plate loss).  The implant should have been placed more palatally, when the buccal plate is missing.

Provisional Without Prep Last Next

Xin Wei, DDS, PhD, MS 1st edition 03/17/2016, last revision 05/20/2018