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Related Experiment Video

Updated: Nov 22, 2025

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Beyond the Core Suture: A New Approach to Tendon Repair.

Weifeng Zeng1, Nicholas J Albano1, Ruston J Sanchez1

  • 1Division of Plastic and Reconstructive Surgery, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wis.

Plastic and Reconstructive Surgery. Global Open
|January 11, 2021
PubMed
Summary

Novel flexor digitorum superficialis (FDS) autograft techniques for flexor digitorum profundus (FDP) tendon repair show improved strength and gap resistance. These methods offer enhanced durability for Zone II injuries compared to traditional repairs.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Hand Surgery

Background:

  • Zone II flexor tendon injuries present persistent challenges despite advancements.
  • Current repair techniques can lead to function-limiting complications.

Purpose of the Study:

  • To introduce and evaluate two novel flexor digitorum profundus (FDP) repair techniques using flexor digitorum superficialis (FDS) autografts.
  • To compare the biomechanical properties of these novel FDS-buttressed FDP repairs against standard clinical methods.

Main Methods:

  • Two novel techniques, asymmetric repair (AR) and circumferential repair, utilizing FDS autografts were developed.
  • Repairs were tested for ultimate tensile strength and cyclical loading in cadaveric sheep tendons.
  • Novel techniques were compared to 2-strand, 4-strand, and 6-strand repairs.

Main Results:

  • AR and circumferential repairs demonstrated comparable ultimate tensile strength to 6-strand repairs.
  • Both novel techniques withstood significantly higher loads than 2-strand and 4-strand repairs.
  • AR and circumferential repairs showed superior cumulative force to failure and gap resistance compared to 6-strand repairs.

Conclusions:

  • Utilizing FDS autografts for FDP repair offers comparable or superior biomechanical strength and resistance to gapping.
  • These novel techniques present a promising alternative for Zone II flexor tendon repair, potentially reducing complications.