Since the proximal contact between #3 and 4 is light with food impaction, the provisional at #5 is fabricated with tight distal contact.  When the patient returns for final crown cementation (Fig.9), the food impaction is minimal between #3 and 4.  The distal black triangle (Fig.10 *) and exposure of the abutment margin (^) are partially related to provisional fabrication and should dissolve over time considering socket shield.

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Xin Wei, DDS, PhD, MS 1st edition 01/13/2020, last revision 03/08/2020