Abstract: A twist drill and bone tap each monitor torque while drilling or threading to assess jaw bone quality and a method for accessing bone quality prior to or while tapping into the bone during a dental implantation procedure. The twist drill for assessing bone quality includes a shank having a proximal section and a distal section. A mounting portion is arranged to connect with a torque monitoring device. A drill point is located at an end of the cutting portion of the drill bit having a helix angle of between about 45 to about 55°, wherein a measurable torque is generated that can be assessed as a function of the quality of the bone material being drilled. A tap for assessing bone quality during tapping includes a shank having opposed ends and a mounting portion is formed in one end and connects with a torque monitoring device.

Abstract: A method of producing a fluted drill in which the flutes are formed by grinding a generally cylindrical blank using a grinding wheel having a profiled circumferential face for generating the cross-sectional form of the flutes is characterized in that the radial cross-section of the profiled circumferential face of the grinding wheel includes a main cutting portion having a convexly curved profile, and a secondary cutting portion forming a continuation of the main cutting portion, there being a change in profile shape at the junction between the main and secondary cutting portions with the secondary cutting portion extending outwardly, away from the extended curve of the main cutting portion profile, to a radially outermost peak of the circumferential face.