difficult exo 24 3 months ago, palatal root fractured and remained, referred out for exo. Socket has not healed up well, soft bone, 2mm or so loss of buccal and palatal. time taken to remove all granulation tissue. entry into sinus chamber with densah drills, no evidence of sinus membrane perforation, packed about .4cc of 80/20 mineralized cortical/xenograft, good pushback of bone, implantn placed, buccal region grafted with same bone. tissue level implant used to compensate for loss of crestal bone