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Related Experiment Video

Updated: Feb 15, 2026

A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
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[Dynamization of fracture fixation : Timing and methods].

L Claes1

  • 1Institut für Unfallchirurgische, Forschung und Biomechanik, Universitätsklinik Ulm, Helmholzstr. 14, 89081, Ulm, Deutschland. Lutz.claes@uni-ulm.de.

Der Unfallchirurg
|January 11, 2018
PubMed
Summary

Dynamization of fracture fixation, altering stability during healing, can accelerate bone repair. Removing interlocking screws from intramedullary nails or decreasing external fixator stiffness shows promising results for fracture healing.

Keywords:
BiomechanicsExternal fixatorsFracture healingIntramedullary nailingTibial fractures

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Regenerative Medicine

Background:

  • Dynamization is a technique used to enhance fracture healing by altering fixation stability.
  • Various methods exist, including intramedullary nail screw removal and external fixator stiffness reduction.
  • Understanding these methods is crucial for optimizing bone repair outcomes.

Purpose of the Study:

  • To review and clarify different dynamization methods in fracture fixation.
  • To evaluate the effectiveness of dynamization in accelerating bone healing.
  • To compare the outcomes of various dynamization techniques.

Main Methods:

  • Analysis of experimental and clinical studies on fracture dynamization.
  • Review of methods involving intramedullary nail interlocking screw removal.
  • Examination of techniques decreasing external fixation stiffness during healing.

Main Results:

  • Dynamization, particularly intramedullary nail screw removal, can accelerate bone healing by promoting telescopic movement and fragment compression.
  • Decreasing external fixator stiffness in later healing phases can achieve callus bridging and maturation.
  • Reverse dynamization (flexible to stable fixation) showed no significant advantages.

Conclusions:

  • Dynamization techniques can positively influence fracture healing, especially for fractures with residual gaps.
  • Optimizing dynamization timing and method is key to successful bone repair.
  • Initial stable fixation remains the primary goal, with unstable fractures requiring prompt stabilization.