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Related Experiment Videos

Augmented Becker versus modified Kessler tenorrhaphy in monkeys: dynamic mechanical analysis

D P Greenwald1, M A Randolph, H Z Hong

  • 1Division of Plastic Surgery, University of South Florida, Tampa, USA.

The Journal of Hand Surgery
|March 1, 1995
PubMed
Summary

The augmented Becker tendon repair technique is significantly stronger than the Kessler repair. Both methods offer 30% gliding efficiency, but Becker repair is recommended for early motion after surgery.

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Hand Surgery

Background:

  • Tendon injuries require effective surgical repair for optimal function.
  • Comparing different surgical techniques is crucial for improving patient outcomes.
  • Augmented Becker and Kessler techniques are common methods for tendon repair.

Purpose of the Study:

  • To compare the strength and gliding efficiency of augmented Becker and Kessler tendon repair techniques.
  • To evaluate the biomechanical performance of these repairs in a cadaver model.
  • To determine the optimal technique for early postoperative motion.

Main Methods:

  • Fresh cadaver macaque monkey hands were used for testing.
  • Gliding efficiency was measured by tendon work and load during excursion before and after repair.

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  • Repair strength was assessed by distraction to rupture using a computer-controlled tensiometer.
  • Data were analyzed using factorial and repeated measures ANOVA.

    • Main Results:

    • Augmented Becker repairs demonstrated significantly greater strength compared to Kessler repairs.
    • Both repair types exhibited 30% gliding efficiency relative to intact controls.
    • Repaired tendons required increased load and work for full fist excursion.

    Conclusions:

    • The augmented Becker repair is biomechanically superior in strength compared to the modified Kessler repair.
    • Both techniques yield similar gliding efficiencies.
    • Augmented Becker repair is recommended for patients anticipating early postoperative motion protocols.