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Temperature elevations in orthopaedic cutting operations

W R Krause, D W Bradbury, J E Kelly

    Journal of Biomechanics
    |January 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

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    Bone cutting temperatures during orthopedic surgery can exceed levels causing thermal necrosis. Irrigation is crucial to maintain safe temperatures, especially with high-speed saws, preventing bone damage.

    Area of Science:

    • Orthopedic Surgery
    • Biomedical Engineering
    • Materials Science

    Background:

    • High-speed bone cutting is essential in orthopedic procedures.
    • Elevated temperatures during bone cutting can lead to thermal necrosis and impair bone healing.
    • Understanding factors influencing bone temperature is critical for surgical safety.

    Purpose of the Study:

    • To investigate the thermal effects of bone cutting with different surgical instruments.
    • To evaluate the impact of varying cutting parameters on bone temperature and cutting forces.
    • To assess the role of irrigation in mitigating heat generation during bone surgery.

    Main Methods:

    • Temperature measurements were recorded using cutting burs (20,000 and 100,000 rpm) and reciprocating saw blades (20,000 strokes/min) on bovine cortical bone.

    Related Experiment Videos

  • Feed rates and depths of cut were systematically varied for cutting burs.
  • The influence of saw design and irrigation on bone temperature was examined.

    • Main Results:

    • Cortical bone temperatures decreased with increased feed rate but rose with greater depth of cut.
    • Rotational speed's effect on temperature varied by bur type.
    • Cutting forces increased with feed rate and depth of cut, but decreased with higher rotational speed.
    • Irrigation significantly reduced bone temperature; its absence led to temperatures exceeding thermal necrosis thresholds.

    Conclusions:

    • Bone cutting parameters significantly influence thermal necrosis risk.
    • Surgical saw design and the use of irrigation are critical factors in managing bone temperature.
    • Adequate irrigation is essential during orthopedic procedures to prevent heat-induced bone damage.