I sometimes encounter patients who don't have enough bone in upper molar teeth missing area for placing dental implants. I learned skills of sinus floor augmentation, surgery of growing new bone in sinus for upcoming dental implants surgery, at University of Michigan in 2002. The reason for going abroad was that I could practice the skills using cadavers in US, which has been prohibited in Japan. Since then, I have overcome the difficulties in placing implants in upper molar. This is one of such cases, CT scan images after 10 years showing stable condition. The more I learn, the more I can contribute.