The crown is separated from the abutment after crown repair.   They are seated together (loose connection) using the crown as a guide to seat the abutment.  BW is taken without the crown.  It appears that the abutment remains seated completely (Fig.17).  前后比较。

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Xin Wei, DDS, PhD, MS 1st edition 03/12/2019, last revision 03/13/2021