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Optimizing compression: Comparing eccentric plate holes and external tensioning devices.

Justin F Lucas1, Mark A Lee1, Jonathan G Eastman1

  • 1Department of Orthopedic Surgery, University of California at Davis, 4860 Y Street, Suite 3800, Sacramento, CA 95817, United States.

Injury
|May 22, 2016
PubMed
Summary
This summary is machine-generated.

Augmenting dynamic compression plating with external devices significantly increases fracture compression. However, some compression is lost after external device removal, suggesting standard techniques may not reliably maintain maximal compression.

Keywords:
Absolute stabilityArticulated tensioning deviceClamp compressionCompression plating

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Area of Science:

  • Orthopedic surgery
  • Biomechanical engineering
  • Fracture healing research

Background:

  • Dynamic compression plating is a standard technique for fracture fixation, aiming for absolute stability and primary bone healing.
  • Achieving and maintaining interfragmentary compression is crucial for successful fracture healing.
  • Current methods may have limitations in sustaining maximal compression.

Purpose of the Study:

  • To evaluate if augmenting dynamic compression plating with external compression techniques increases fracture compression.
  • To compare the effectiveness of Verbrugge clamp and articulated tensioning device (ATD) in enhancing plate compression.
  • To assess the maintenance of compression after the removal of external compression devices.

Main Methods:

  • Simulated transverse diaphyseal fractures in composite bone models.
  • Measurement of interfragmentary compression using a load cell.
  • Application of dynamic compression plate alone versus augmented with Verbrugge clamp or ATD.
  • Statistical analysis using linear mixed effects models.

Main Results:

  • Both external compression techniques (Verbrugge and ATD) yielded significantly higher compression than plate alone (78% and 134% increase, respectively).
  • Compression decreased by 17% (Verbrugge) and 22% (ATD) after external device removal, with ATD showing statistical significance (P=0.038).
  • Additional eccentric screws further increased compression in both techniques.

Conclusions:

  • External compression techniques significantly enhance the compressive load achieved with dynamic compression plating.
  • Standard dynamic compression plating may not reliably maintain maximal compression after external device removal.
  • Augmentation strategies offer potential for improved fracture fixation outcomes.