I am currently on Prolia for osteoperosis, dentist told me I need a tooth extraction,but I am concerned about getting ONJ, my last injection was approximately 6 weeks ago,is it safe to do so? Should I try to wait until the Prolia is out of my system? I read it stays in your system 6 months. My level of osteoperosis was 3.7 in my spine one year ago,won t get another dexa scan until November to see if I am improving, also have Celiac Disease and have parathyroid surgery 18 months ago. Thank you for your reply.