guided surgery with versah guided kit, some issues with depth of osteotomy. 26 guide used but depth was adjusted different from protocol. Prepared about 1.5 mm past sinus floor, entry into sinus chamber, no evidence of membrane perforation, packed about 1cc of 90/10 mix of mineralized cortical/xenograft, good pushback of bone, implant placed right side had a lot more lenght of bone. prepare preparation of osteotomy with densah drills, no entry into sinus chamber. implant placed but poor stability, replaced implant with wider one, implant adjacent to 17 broken to gum line removed 17, proximal bone between 16 implant and 17, 17 socket grafted.