I have a healthy 56 year old male patient, non-smoker. I extracted #13 and placed an immediate implant, MIS 5×13. #14 was already missing a tooth. I did an intralift sinus lift using the MIS compression kit. I packed cortico-cancellous bone through the opening. I then placed an MIS 3.75×10 and achieved good primary stability and the radiograph looked good. I achieved good primary closure. The patient returned at one month to remove the PTFE suture and the radiograph showed significant bone resorption around the implant in #14 site. Any thoughts on this? Recommendations?