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Related Experiment Videos

Cyclic joint loading can affect the initial stability of meniscal fixation implants.

Lutz Dürselen1, Jan Schneider, Mario Galler

  • 1Institute of Orthopaedic Research and Biomechanics, University of Ulm, Helmholtzstrasse 14, 89081, Ulm, Germany. lutz.duerselen@medizin.uni-ulm.de

Clinical Biomechanics (Bristol, Avon)
|January 16, 2003
PubMed
Summary

Cyclic loading reduced the fixation strength of some meniscal repair devices. Horizontal sutures and the Meniscal Fastener showed decreased pull-out force after cyclic joint loading, highlighting the importance of implant stiffness.

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Area of Science:

  • Orthopedic surgery
  • Biomechanical engineering
  • Sports medicine

Background:

  • Meniscal repair implant studies often neglect cyclic loading effects.
  • Understanding mechanical performance under joint loads is crucial for meniscal healing.

Purpose of the Study:

  • To evaluate the initial fixation strength of meniscal repair techniques under cyclic joint loading.
  • To compare the mechanical stability of different meniscal implants and sutures.

Main Methods:

  • Four meniscal refixation methods (Meniscal Fastener, Meniscal Arrow, ClearFix Screw, horizontal suture) were tested in porcine knees.
  • Initial pull-out strength was assessed before and after 5000 cycles of axial loading (10-200 N).

Main Results:

Related Experiment Videos

  • The horizontal suture exhibited the highest initial pull-out force (103 N), followed by the Arrow (52 N), Fastener (29 N), and Screw (22 N).
  • Cyclic loading significantly reduced pull-out strength for the horizontal suture (82 N) and Meniscal Fastener (23 N).

Conclusions:

  • Cyclic loading can decrease the fixation strength of less stiff meniscal repair devices.
  • Further research is needed to determine the optimal fixation strength required for meniscal healing.