Experimental Study of Thrust Force and Torque for Drilling Cortical Bone

Surgical Drill Bit Design and Thermomechanical Damage in Bone Drilling: A Review

“…Shear deformation zone and friction zone 1 convert mechanical work into heat, 175 but the energy from friction zone 2 is negligible if the sharp drill bit is used. 51,115,123,175 Shearing process produces bone chips 174 ; these bone debris must be evacuated from the drilling site to prevent clogging the drill flute 70,71 and drill hole. 6,7 Clogged drilling hole and drill flute increase the drilling force, torque, and bone temperature.…”

“…6,7 Clogged drilling hole and drill flute increase the drilling force, torque, and bone temperature. While excessive drilling force and torque may lead to the drill breakage, 174 the bone temperature elevation could accumulate the heat in the drilling hole and kill the bone cells and surrounding tissues. 140 In bone drilling, the bone structure is disrupted and exposed to the high temperature.…”

“…6,7 The radial force (F y ) acts on both of the cutting lips, which balances each other; increasing drill diameter raises this force. 4, 174 The principal cutting force (F z ) overlaps with the cutting velocity path and affects the drilling torque; a larger diameter increases principal cutting force and drilling torque. 164,174…”

Measurement and prediction of drilling force in fresh human cadaver mandibles: A pilot study

“…Lin et al considered only two major sources of force, the cutting lips and the chisel edge, which simplified Wang's function . Sui et al obtained a quadratic regression equation that relates to tool rotational speeds and feed rates to predict the drilling force . Tahmasbi et al established a regression formula with parameters of tool rotational speeds, feed rates, and tool diameters aiming to minimize drilling force; in addition, they considered the temperature limitations during the bone drilling process …”

“…22 Sui et al obtained a quadratic regression equation that relates to tool rotational speeds and feed rates to predict the drilling force. 23 Tahmasbi et al established a regression formula with parameters of tool rotational speeds, feed rates, and tool diameters aiming to minimize drilling force; in addition, they considered the temperature limitations during the bone drilling process. 15 Although some researchers have previously studied the significant effects of crucial parameters on drilling force, their workpieces were almost confined to animal bones, such as bovine or swine bones, which have little practical significance on dental implantation in human bodies.…”