Comparison of Cortical Bone Drilling Induced Heat Production Among Common Drilling Tools

Abstract

Twist drills produced the smallest temperature rise among all bit types. Thermal effects should not be a reason for choosing K-wire size. The cannulated drill showed significantly higher temperatures when compared with standard drills, reaching maximal temperatures comparable with K wires.

Numerical evaluation of sequential bone drilling strategies based on thermal damage

“…The detailed spatial distribution might be generated based on the cutting edge geometry [18], but the impact on the overall temperature of the operating area is limited. Lastly, the heat flux was independent of time since tool wear and chip build-up issues were found to be insignificant under proper operating conditions [21].…”

“…To further validate the two averaged heat fluxes, they were compared to the single hole drilling data in our prior study [21], where drilling tools from eight repeated tests showed that the temperature changes caused by K-wire drilling at 0.5 mm from the hole margin was 48.7±4.5°C, and that by a twist drill was 35.1 ± 9.3°C. By applying the heat fluxes to a single hole 3D FEA (as shown in Fig.…”

“…The thickness of each layer was set to be 0.1 mm, which was equivalent to a 0.1 s time duration under 1 mm/s feed rate used for these experiments. This feed rate was selected in our prior study on drilling tool comparison based on the motion detected during hand-held drilling [21]. Resolution and accuracy of the temperature field next to the heat source are significantly affected by the layer thickness: finer advection layers create a more continuous movement for the heat source, but also significantly increases the number of elements and steps, resulting in a heavy computational load.…”

When Should We Change Drill Bits? A Mechanical Comparison of New, Reprocessed, and Damaged Bits

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] This can represent a sizable portion of the implant budget, especially at high-volume institutions. Many facilities treat orthopaedic drill bits as single-use items because of concerns regarding degradation of performance, breakage, and heat generation.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] This can represent a sizable portion of the implant budget, especially at high-volume institutions. 4,5,11,17,18 In a biomechanical model of orthopaedic drilling, we sought to answer several questions. 14 No clinical guidelines regarding when a bit should be discarded are currently available.…”