Periodontal dressing is applied.  The distolingual portion of it gets lost due to brushing a day later.  When he returns, the dressing is removed (Fig.10).  It appears that the growing in gingival margin is pushing the bone graft out.

Acrylic Dressing Last Next Xin Wei, DDS, PhD, MS 1st edition 05/16/2019, last revision 05/17/2019