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Related Experiment Videos

Enhanced fixation with hydroxyapatite coated pins

A Moroni1, P Aspenberg, S Toksvig-Larsen

  • 1Ninth Department of Orthopaedic Surgery, Bologna University, Rizzoli Orthopaedic Institute, Italy.

Clinical Orthopaedics and Related Research
|May 13, 1998
PubMed
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Hydroxyapatite coated pins for external fixation of tibial fractures significantly reduce infection and mechanical failure. These coated pins offer enhanced stability, improving patient outcomes compared to uncoated pins.

Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Infectious disease

Background:

  • External fixation is a common treatment for tibial fractures.
  • Pin tract infections and mechanical failure are known complications.
  • Improving pin stability can mitigate these risks.

Purpose of the Study:

  • To evaluate the efficacy of hydroxyapatite coated bicylindrical pins in external fixation of tibial fractures.
  • To compare the stability and infection rates of coated versus uncoated pins.
  • To assess the impact of hydroxyapatite coating on pin mechanical performance.

Main Methods:

  • Three groups of seven patients underwent external fixation for middiaphyseal tibial fractures.
  • Groups received uncoated pins, uncoated bicylindrical pins, or hydroxyapatite coated bicylindrical pins.

Related Experiment Videos

  • Pin insertion and extraction torques were measured; pin tract infections were recorded.

    • Main Results:

    • All fractures achieved union.
    • Hydroxyapatite coated pins demonstrated significantly higher extraction torque (2.1 Nm) compared to uncoated pins (0.1 Nm).
    • Pin tract infection occurred in 7 of 14 patients with uncoated pins, versus none with coated pins.

    Conclusions:

    • Hydroxyapatite coating enhances the stability of external fixation pins.
    • Increased stability reduces the risk of pin tract infection and mechanical failure.
    • Coated pins represent a significant improvement for tibial fracture external fixation.