An immediate implant is to be placed deep (Fig.3 black area; 6.9x10 mm SM) because of severe bone loss.  The cemented abutment (green area) should be long (length 5.5 mm, cuff 6 mm).  The diameter of the abutment should be 6.8 or 7.8 mm.

Long Abutment

Xin Wei, DDS, PhD, MS 1st edition 03/30/2015, last revision 03/30/2015