To prevent periimplantitis, a short implant (5x5 mm) will be placed subcrestal at #31 (Fig.5).  Sticky bone is a must.  Pulpal test will determine whether RCT is required for #30 (curved white line).  In fact the tooth #30 is tested to be vital.  Onlay graft is an option for #31 (Fig.6 red rectangle).  Pink: particulate graft; white: fixation screw

Subcrest  Last  Next Xin Wei, DDS, PhD, MS 1st edition 12/25/2019, last revision 12/29/2019