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Optimal parameters to avoid thermal necrosis during bone drilling: A finite element analysis.

Mohamed Mediouni1, Daniel R Schlatterer2, Amal Khoury3

  • 12500 boul. de l'Université, Sherbrooke, Quebec J1 K 2R1, Canada.

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
|February 10, 2017
PubMed
Summary

Reducing drilling feeding speed significantly lowers bone temperature, preventing necrosis and screw loosening. This simple method aids surgeons in optimizing drilling parameters to avoid bone-implant complications.

Keywords:
drillingfinite element analysis (FEA)osteonecrosis

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Area of Science:

  • Orthopaedic Research
  • Biomedical Engineering
  • Surgical Innovation

Background:

  • Bone drilling generates frictional heat, potentially causing osteonecrosis.
  • Heat-induced necrosis can lead to screw loosening and implant failure.
  • In vivo studies face challenges in controlling variables and acquiring real-time temperature data.

Purpose of the Study:

  • To investigate the impact of drilling parameters on bone temperature using finite element analysis.
  • To identify methods for reducing heat generation during bone drilling.
  • To provide guidance for surgeons to prevent osteonecrosis and implant loosening.

Main Methods:

  • Developed a 3D acetabular bone model using elastic-plastic properties.
  • Applied finite element analysis (FEA) to simulate various bone drilling scenarios.
  • Analyzed the effects of drilling depth, drill speed, and feeding speed on bone temperature.

Main Results:

  • FEA results demonstrate that drilling depth and drill speed significantly influence bone temperature.
  • A reduction in feeding speed was found to decrease bone temperature.
  • Lowering feeding speed effectively reduces drilling temperatures, irrespective of RPMs or applied pressure.

Conclusions:

  • Reducing feeding speed is a simple, effective strategy to minimize bone temperature during drilling.
  • This finding offers valuable insights for surgeons to optimize drilling parameters.
  • The study aims to prevent osteonecrosis and improve screw purchase in bone.