difficult exo with crown faling off, roots sectioned, MB root has exposure into sinus and membrane perforation, prepared osteotomy in ideal position (furcal region) short of sinus floor, remainder with densah drills and slow drilling of implant drills, placed collagen membrane soaked in prf fluid at sinus foor, packed about .5cc of sticky bone from 90/10 mix of mineralized cortical/xenograft, limited pushback of bone, considered 6mm length implant but stablity unlikely, socket grafted region wtih collagen mmebrane overtop, Stretched buccal flap