The tapping torque using in this thesis is used to test the quality of the jaw bone.Testing the quality of jaw bone is the first step of placing the implant. However,several existing methods for various reasons are not the best ways to measure thequality of bone quality. In this project, a solution explored in this pilot study wasbased on the fact that bone quality can be assessed from cutting resistance whentapping or threading in bone [Johansson P, Strid K-G. 1994], and the experimentwhich tapping into testing material has been done by Carlsson TL Medical AB.Authors’ duty is to analysis the data what we get from industrial supervisor tosummarize a formula to present the thickness of bone and createa scale connecting the tapping torque and material quality. Then compare thetapping torque of the known-quality material with the tapping torque of bone,quality of bone can be known. The study about measurement of bone thickness andscale connecting the cutting force with material quality describe the benefit thatdental implant surgery will more accurate than surgeon’s feeling and otherexpensive equipment according to the torque which is measured in pre-tappingprocess