Since the pontic (Fig.1 #8) of the existing failed FPD has severe buccal concavity (*), socket shield is performed when #7 and 9 are extracted (Fig.2,3 *).  Angled abutments are placed when 3.5x13 mm implants are inserted with guide.  An immediate provisional FPD is fabricated.  The abutment at #9 may be incompletely seated.  Prepare new bone profile drills (DIO, two diameters).

Shield Last Next Xin Wei, DDS, PhD, MS 1st edition 10/01/2019, last revision 01/25/2020