After proximal trimming (Fig.11 *), the abutment at #3 is seated completely.  After lab repair, oral crown cementation, crown/abutment removal for excess cement removal, the crown/abutment cannot be torqued >25 Ncm (Fig.12, 30 Ncm).   PA shows incomplete seating (Fig.12).

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 Xin Wei, DDS, PhD, MS 1st edition 04/19/2021, last revision 04/19/2021