When the crown at #9 is removed, the 3.5x5 mm existig abutment is loose.  It is changed to a 4x5 mm one, which is then cemented and prepared (Fig.26).  A PFM will be made at #9 as the one at #8.  Guided surgery should avoid the problem.

Treat Early Implants as Immediate Ones Last Next Xin Wei, DDS, PhD, MS 1st edition 12/04/2018, last revision 12/24/2018