When the periodontal dressing is removed, there is a gap between the margin of the provisional and that of the gingiva (Fig.3 between arrow and arrowhead), suggesting that the latter has shrunk postop. If there were no periodontal dressing, some of bone graft may have been lost.
Xin Wei, DDS, PhD, MS 1st edition 04/26/2019, last revision 07/07/2019