Schedule 0 [Shiau-ROC TAIWAN-P-4] Nobel bone density evaluation based on drilling torque value using a newly designed drill *Kaien Wakamatsu1, Kazuya Doi1, Reiko Kobatake1, Yoshihumi Oki1, Hiroshi Oue1, Takayasu Kubo1, Kazuhiro Tsuga1 (1. Hiroshima University)